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## Uses of Class
java.io.IOException

Packages that use IOException
java.io |
java.lang |
java.net |
java.security |
java.util |
java.util.jar |
java.util.zip |
javax.microedition.io |

Uses of IOException in java.io

Subclasses of IOException in java.io
`class` | `CharConversionException` Base class for character conversion exceptions.
`class` | `EOFException` Signals that an end of file or end of stream has been reached unexpectedly during input.
`class` | `FileNotFoundException` Signals that an attempt to open the file denoted by a specified pathname has failed.
`class` | `InterruptedIOException` Signals that an I/O operation has been interrupted.
`class` | `InvalidClassException` Thrown when the Serialization runtime detects one of the following problems with a Class.
`class` | `InvalidObjectException` Indicates that one or more deserialized objects failed validation tests.
`class` | `NotActiveException` Thrown when serialization or deserialization is not active.
`class` | `NotSerializableException` Thrown when an instance is required to have a Serializable interface.
`class` | `ObjectStreamException` Superclass of all exceptions specific to Object Stream classes.
`class` | `OptionalDataException` Unexpected data appeared in an ObjectInputStream trying to read an Object.
`class` | `StreamCorruptedException` Thrown when control information that was read from an object stream violates internal consistency checks.
`class` | `SyncFailedException` Signals that a sync operation has failed.
`class` | `UnsupportedEncodingException` The Character Encoding is not supported.
`class` | `UTFDataFormatException` Signals that a malformed UTF-8 string has been read in a data input stream or by any class that implements the data input interface.
`class` | `WriteAbortedException` Signals that one of the ObjectStreamExceptions was thrown during a write operation.

Methods in java.io that throw IOException
`int` | `Reader.read()` Read a single character.
`int` | `Reader.read(char[] cbuf)` Read characters into an array.
`abstract int` | `Reader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`long` | `Reader.skip(long n)` Skip characters.
`boolean` | `Reader.ready()` Tell whether this stream is ready to be read.
`void` | `Reader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `Reader.reset()` Reset the stream.
`abstract void` | `Reader.close()` Close the stream.
`int` | `FilterReader.read()` Read a single character.
`int` | `FilterReader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`long` | `FilterReader.skip(long n)` Skip characters.
`boolean` | `FilterReader.ready()` Tell whether this stream is ready to be read.
`void` | `FilterReader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `FilterReader.reset()` Reset the stream.
`void` | `FilterReader.close()` Close the stream.
`void` | `Writer.write(int c)` Write a single character.
`void` | `Writer.write(char[] cbuf)` Write an array of characters.
`abstract void` | `Writer.write(char[] cbuf, int off, int len)` Write a portion of an array of characters.
`void` | `Writer.write(String str)` Write a string.
`void` | `Writer.write(String str, int off, int len)` Write a portion of a string.
`abstract void` | `Writer.flush()` Flush the stream.
`abstract void` | `Writer.close()` Close the stream, flushing it first.
`void` | `FilterWriter.write(int c)` Write a single character.
`void` | `FilterWriter.write(char[] cbuf, int off, int len)` Write a portion of an array of characters.
`void` | `FilterWriter.write(String str, int off, int len)` Write a portion of a string.
`void` | `FilterWriter.flush()` Flush the stream.
`void` | `FilterWriter.close()` Close the stream.
`abstract int` | `InputStream.read()` Reads the next byte of data from the input stream.
`int` | `InputStream.read(byte[] b)` Reads some number of bytes from the input stream and stores them into the buffer array `b`.
`int` | `InputStream.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from the input stream into an array of bytes.
`long` | `InputStream.skip(long n)` Skips over and discards `n` bytes of data from this input stream.
`int` | `InputStream.available()` Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.
`void` | `InputStream.close()` Closes this input stream and releases any system resources associated with the stream.
`void` | `InputStream.reset()` Repositions this stream to the position at the time the `mark` method was last called on this input stream.
`int` | `FilterInputStream.read()` Reads the next byte of data from this input stream.
`int` | `FilterInputStream.read(byte[] b)` Reads up to `byte.length` bytes of data from this input stream into an array of bytes.
`int` | `FilterInputStream.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this input stream into an array of bytes.
`long` | `FilterInputStream.skip(long n)` Skips over and discards `n` bytes of data from the input stream.
`int` | `FilterInputStream.available()` Returns the number of bytes that can be read from this input stream without blocking.
`void` | `FilterInputStream.close()` Closes this input stream and releases any system resources associated with the stream.
`void` | `FilterInputStream.reset()` Repositions this stream to the position at the time the `mark` method was last called on this input stream.
`abstract void` | `OutputStream.write(int b)` Writes the specified byte to this output stream.
`void` | `OutputStream.write(byte[] b)` Writes `b.length` bytes from the specified byte array to this output stream.
`void` | `OutputStream.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this output stream.
`void` | `OutputStream.flush()` Flushes this output stream and forces any buffered output bytes to be written out.
`void` | `OutputStream.close()` Closes this output stream and releases any system resources associated with this stream.
`void` | `FilterOutputStream.write(int b)` Writes the specified `byte` to this output stream.
`void` | `FilterOutputStream.write(byte[] b)` Writes `b.length` bytes to this output stream.
`void` | `FilterOutputStream.write(byte[] b, int off, int len)` Writes `len` bytes from the specified `byte` array starting at offset `off` to this output stream.
`void` | `FilterOutputStream.flush()` Flushes this output stream and forces any buffered output bytes to be written out to the stream.
`void` | `FilterOutputStream.close()` Closes this output stream and releases any system resources associated with the stream.
`void` | `PipedReader.connect(PipedWriter src)` Causes this piped reader to be connected to the piped writer `src`.
`int` | `PipedReader.read()` Reads the next character of data from this piped stream.
`int` | `PipedReader.read(char[] cbuf, int off, int len)` Reads up to `len` characters of data from this piped stream into an array of characters.
`boolean` | `PipedReader.ready()` Tell whether this stream is ready to be read.
`void` | `PipedReader.close()` Closes this piped stream and releases any system resources associated with the stream.
`void` | `PipedWriter.connect(PipedReader snk)` Connects this piped writer to a receiver.
`void` | `PipedWriter.write(int c)` Writes the specified `char` to the piped output stream.
`void` | `PipedWriter.write(char[] cbuf, int off, int len)` Writes `len` characters from the specified character array starting at offset `off` to this piped output stream.
`void` | `PipedWriter.flush()` Flushes this output stream and forces any buffered output characters to be written out.
`void` | `PipedWriter.close()` Closes this piped output stream and releases any system resources associated with this stream.
`void` | `Externalizable.writeExternal(ObjectOutput out)` The object implements the writeExternal method to save its contents by calling the methods of DataOutput for its primitive values or calling the writeObject method of ObjectOutput for objects, strings, and arrays.
`void` | `Externalizable.readExternal(ObjectInput in)` The object implements the readExternal method to restore its contents by calling the methods of DataInput for primitive types and readObject for objects, strings and arrays.
`int` | `PushbackReader.read()` Read a single character.
`int` | `PushbackReader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`void` | `PushbackReader.unread(int c)` Push back a single character.
`void` | `PushbackReader.unread(char[] cbuf, int off, int len)` Push back a portion of an array of characters by copying it to the front of the pushback buffer.
`void` | `PushbackReader.unread(char[] cbuf)` Push back an array of characters by copying it to the front of the pushback buffer.
`boolean` | `PushbackReader.ready()` Tell whether this stream is ready to be read.
`void` | `PushbackReader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `PushbackReader.reset()` Reset the stream.
`void` | `PushbackReader.close()` Close the stream.
`void` | `DataOutputStream.write(int b)` Writes the specified byte (the low eight bits of the argument `b`) to the underlying output stream.
`void` | `DataOutputStream.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to the underlying output stream.
`void` | `DataOutputStream.flush()` Flushes this data output stream.
`void` | `DataOutputStream.writeBoolean(boolean v)` Writes a `boolean` to the underlying output stream as a 1-byte value.
`void` | `DataOutputStream.writeByte(int v)` Writes out a `byte` to the underlying output stream as a 1-byte value.
`void` | `DataOutputStream.writeShort(int v)` Writes a `short` to the underlying output stream as two bytes, high byte first.
`void` | `DataOutputStream.writeChar(int v)` Writes a `char` to the underlying output stream as a 2-byte value, high byte first.
`void` | `DataOutputStream.writeInt(int v)` Writes an `int` to the underlying output stream as four bytes, high byte first.
`void` | `DataOutputStream.writeLong(long v)` Writes a `long` to the underlying output stream as eight bytes, high byte first.
`void` | `DataOutputStream.writeFloat(float v)` Converts the float argument to an `int` using the `floatToIntBits` method in class `Float`, and then writes that `int` value to the underlying output stream as a 4-byte quantity, high byte first.
`void` | `DataOutputStream.writeDouble(double v)` Converts the double argument to a `long` using the `doubleToLongBits` method in class `Double`, and then writes that `long` value to the underlying output stream as an 8-byte quantity, high byte first.
`void` | `DataOutputStream.writeBytes(String s)` Writes out the string to the underlying output stream as a sequence of bytes.
`void` | `DataOutputStream.writeChars(String s)` Writes a string to the underlying output stream as a sequence of characters.
`void` | `DataOutputStream.writeUTF(String str)` Writes a string to the underlying output stream using UTF-8 encoding in a machine-independent manner.
`int` | `BufferedReader.read()` Read a single character.
`int` | `BufferedReader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`String` | `BufferedReader.readLine()` Read a line of text.
`long` | `BufferedReader.skip(long n)` Skip characters.
`boolean` | `BufferedReader.ready()` Tell whether this stream is ready to be read.
`void` | `BufferedReader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `BufferedReader.reset()` Reset the stream to the most recent mark.
`void` | `BufferedReader.close()` Close the stream.
`int` | `LineNumberReader.read()` Read a single character.
`int` | `LineNumberReader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`String` | `LineNumberReader.readLine()` Read a line of text.
`long` | `LineNumberReader.skip(long n)` Skip characters.
`void` | `LineNumberReader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `LineNumberReader.reset()` Reset the stream to the most recent mark.
`void` | `FileOutputStream.write(int b)` Writes the specified byte to this file output stream.
`void` | `FileOutputStream.write(byte[] b)` Writes `b.length` bytes from the specified byte array to this file output stream.
`void` | `FileOutputStream.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this file output stream.
`void` | `FileOutputStream.close()` Closes this file output stream and releases any system resources associated with this stream.
`FileDescriptor` | `FileOutputStream.getFD()` Returns the file descriptor associated with this stream.
`protected void` | `FileOutputStream.finalize()` Cleans up the connection to the file, and ensures that the `close` method of this file output stream is called when there are no more references to this stream.
`Object` | `ObjectInput.readObject()` Read and return an object.
`int` | `ObjectInput.read()` Reads a byte of data.
`int` | `ObjectInput.read(byte[] b)` Reads into an array of bytes.
`int` | `ObjectInput.read(byte[] b, int off, int len)` Reads into an array of bytes.
`long` | `ObjectInput.skip(long n)` Skips n bytes of input.
`int` | `ObjectInput.available()` Returns the number of bytes that can be read without blocking.
`void` | `ObjectInput.close()` Closes the input stream.
`int` | `StringReader.read()` Read a single character.
`int` | `StringReader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`long` | `StringReader.skip(long ns)` Skip characters.
`boolean` | `StringReader.ready()` Tell whether this stream is ready to be read.
`void` | `StringReader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `StringReader.reset()` Reset the stream to the most recent mark, or to the beginning of the string if it has never been marked.
`int` | `StreamTokenizer.nextToken()` Parses the next token from the input stream of this tokenizer.
`Object` | `ObjectInputStream.readObject()` Read an object from the ObjectInputStream.
`protected Object` | `ObjectInputStream.readObjectOverride()` This method is called by trusted subclasses of ObjectOutputStream that constructed ObjectOutputStream using the protected no-arg constructor.
`void` | `ObjectInputStream.defaultReadObject()` Read the non-static and non-transient fields of the current class from this stream.
`ObjectInputStream.GetField` | `ObjectInputStream.readFields()` Reads the persistent fields from the stream and makes them available by name.
`protected Class` | `ObjectInputStream.resolveClass(ObjectStreamClass v)` Load the local class equivalent of the specified stream class description.
`protected Class` | `ObjectInputStream.resolveProxyClass(String[] interfaces)` Returns a proxy class that implements the interfaces named in a proxy class descriptor; subclasses may implement this method to read custom data from the stream along with the descriptors for dynamic proxy classes, allowing them to use an alternate loading mechanism for the interfaces and the proxy class.
`protected Object` | `ObjectInputStream.resolveObject(Object obj)` This method will allow trusted subclasses of ObjectInputStream to substitute one object for another during deserialization.
`protected void` | `ObjectInputStream.readStreamHeader()` The readStreamHeader method is provided to allow subclasses to read and verify their own stream headers.
`protected ObjectStreamClass` | `ObjectInputStream.readClassDescriptor()` Read a class descriptor from the serialization stream.
`int` | `ObjectInputStream.read()` Reads a byte of data.
`int` | `ObjectInputStream.read(byte[] b, int off, int len)` Reads into an array of bytes.
`int` | `ObjectInputStream.available()` Returns the number of bytes that can be read without blocking.
`void` | `ObjectInputStream.close()` Closes the input stream.
`boolean` | `ObjectInputStream.readBoolean()` Reads in a boolean.
`byte` | `ObjectInputStream.readByte()` Reads an 8 bit byte.
`int` | `ObjectInputStream.readUnsignedByte()` Reads an unsigned 8 bit byte.
`short` | `ObjectInputStream.readShort()` Reads a 16 bit short.
`int` | `ObjectInputStream.readUnsignedShort()` Reads an unsigned 16 bit short.
`char` | `ObjectInputStream.readChar()` Reads a 16 bit char.
`int` | `ObjectInputStream.readInt()` Reads a 32 bit int.
`long` | `ObjectInputStream.readLong()` Reads a 64 bit long.
`float` | `ObjectInputStream.readFloat()` Reads a 32 bit float.
`double` | `ObjectInputStream.readDouble()` Reads a 64 bit double.
`void` | `ObjectInputStream.readFully(byte[] data)` Reads bytes, blocking until all bytes are read.
`void` | `ObjectInputStream.readFully(byte[] data, int offset, int size)` Reads bytes, blocking until all bytes are read.
`int` | `ObjectInputStream.skipBytes(int len)` Skips bytes, block until all bytes are skipped.
`String` | `ObjectInputStream.readLine()` Deprecated. This method does not properly convert bytes to characters. see DataInputStream for the details and alternatives.
`String` | `ObjectInputStream.readUTF()` Reads a UTF format String.
`abstract boolean` | `ObjectInputStream.GetField.defaulted(String name)` Return true if the named field is defaulted and has no value in this stream.
`abstract boolean` | `ObjectInputStream.GetField.get(String name, boolean defvalue)` Get the value of the named boolean field from the persistent field.
`abstract char` | `ObjectInputStream.GetField.get(String name, char defvalue)` Get the value of the named char field from the persistent fields.
`abstract byte` | `ObjectInputStream.GetField.get(String name, byte defvalue)` Get the value of the named byte field from the persistent fields.
`abstract short` | `ObjectInputStream.GetField.get(String name, short defvalue)` Get the value of the named short field from the persistent fields.
`abstract int` | `ObjectInputStream.GetField.get(String name, int defvalue)` Get the value of the named int field from the persistent fields.
`abstract long` | `ObjectInputStream.GetField.get(String name, long defvalue)` Get the value of the named long field from the persistent fields.
`abstract float` | `ObjectInputStream.GetField.get(String name, float defvalue)` Get the value of the named float field from the persistent fields.
`abstract double` | `ObjectInputStream.GetField.get(String name, double defvalue)` Get the value of the named double field from the persistent field.
`abstract Object` | `ObjectInputStream.GetField.get(String name, Object defvalue)` Get the value of the named Object field from the persistent field.
`void` | `PipedInputStream.connect(PipedOutputStream src)` Causes this piped input stream to be connected to the piped output stream `src`.
`protected void` | `PipedInputStream.receive(int b)` Receives a byte of data.
`int` | `PipedInputStream.read()` Reads the next byte of data from this piped input stream.
`int` | `PipedInputStream.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this piped input stream into an array of bytes.
`int` | `PipedInputStream.available()` Returns the number of bytes that can be read from this input stream without blocking.
`void` | `PipedInputStream.close()` Closes this piped input stream and releases any system resources associated with the stream.
`int` | `InputStreamReader.read()` Read a single character.
`int` | `InputStreamReader.read(char[] cbuf, int off, int len)` Read characters into a portion of an array.
`boolean` | `InputStreamReader.ready()` Tell whether this stream is ready to be read.
`void` | `InputStreamReader.close()` Close the stream.
`int` | `PushbackInputStream.read()` Reads the next byte of data from this input stream.
`int` | `PushbackInputStream.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this input stream into an array of bytes.
`void` | `PushbackInputStream.unread(int b)` Pushes back a byte by copying it to the front of the pushback buffer.
`void` | `PushbackInputStream.unread(byte[] b, int off, int len)` Pushes back a portion of an array of bytes by copying it to the front of the pushback buffer.
`void` | `PushbackInputStream.unread(byte[] b)` Pushes back an array of bytes by copying it to the front of the pushback buffer.
`int` | `PushbackInputStream.available()` Returns the number of bytes that can be read from this input stream without blocking.
`long` | `PushbackInputStream.skip(long n)` Skips over and discards `n` bytes of data from this input stream.
`void` | `PushbackInputStream.close()` Closes this input stream and releases any system resources associated with the stream.
`void` | `ObjectOutput.writeObject(Object obj)` Write an object to the underlying storage or stream.
`void` | `ObjectOutput.write(int b)` Writes a byte.
`void` | `ObjectOutput.write(byte[] b)` Writes an array of bytes.
`void` | `ObjectOutput.write(byte[] b, int off, int len)` Writes a sub array of bytes.
`void` | `ObjectOutput.flush()` Flushes the stream.
`void` | `ObjectOutput.close()` Closes the stream.
`String` | `File.getCanonicalPath()` Returns the canonical pathname string of this abstract pathname.
`File` | `File.getCanonicalFile()` Returns the canonical form of this abstract pathname.
`boolean` | `File.createNewFile()` Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist.
`static File` | `File.createTempFile(String prefix, String suffix, File directory)` Creates a new empty file in the specified directory, using the given prefix and suffix strings to generate its name.
`static File` | `File.createTempFile(String prefix, String suffix)` Creates an empty file in the default temporary-file directory, using the given prefix and suffix to generate its name.
`void` | `DataOutput.write(int b)` Writes to the output stream the eight low-order bits of the argument `b`.
`void` | `DataOutput.write(byte[] b)` Writes to the output stream all the bytes in array `b`.
`void` | `DataOutput.write(byte[] b, int off, int len)` Writes `len` bytes from array `b`, in order, to the output stream.
`void` | `DataOutput.writeBoolean(boolean v)` Writes a `boolean` value to this output stream.
`void` | `DataOutput.writeByte(int v)` Writes to the output stream the eight low- order bits of the argument `v`.
`void` | `DataOutput.writeShort(int v)` Writes two bytes to the output stream to represent the value of the argument.
`void` | `DataOutput.writeChar(int v)` Writes a `char` value, wich is comprised of two bytes, to the output stream.
`void` | `DataOutput.writeInt(int v)` Writes an `int` value, which is comprised of four bytes, to the output stream.
`void` | `DataOutput.writeLong(long v)` Writes an `long` value, which is comprised of four bytes, to the output stream.
`void` | `DataOutput.writeFloat(float v)` Writes a `float` value, which is comprised of four bytes, to the output stream.
`void` | `DataOutput.writeDouble(double v)` Writes a `double` value, which is comprised of eight bytes, to the output stream.
`void` | `DataOutput.writeBytes(String s)` Writes a string to the output stream.
`void` | `DataOutput.writeChars(String s)` Writes every character in the string `s`, to the output stream, in order, two bytes per character.
`void` | `DataOutput.writeUTF(String str)` Writes two bytes of length information to the output stream, followed by the Java modified UTF representation of every character in the string `s`.
`void` | `OutputStreamWriter.write(int c)` Write a single character.
`void` | `OutputStreamWriter.write(char[] cbuf, int off, int len)` Write a portion of an array of characters.
`void` | `OutputStreamWriter.write(String str, int off, int len)` Write a portion of a string.
`void` | `OutputStreamWriter.flush()` Flush the stream.
`void` | `OutputStreamWriter.close()` Close the stream.
`void` | `DataInput.readFully(byte[] b)` Reads some bytes from an input stream and stores them into the buffer array `b`.
`void` | `DataInput.readFully(byte[] b, int off, int len)` Reads `len` bytes from an input stream.
`int` | `DataInput.skipBytes(int n)` Makes an attempt to skip over `n` bytes of data from the input stream, discarding the skipped bytes.
`boolean` | `DataInput.readBoolean()` Reads one input byte and returns `true` if that byte is nonzero, `false` if that byte is zero.
`byte` | `DataInput.readByte()` Reads and returns one input byte.
`int` | `DataInput.readUnsignedByte()` Reads one input byte, zero-extends it to type `int`, and returns the result, which is therefore in the range `0` through `255`.
`short` | `DataInput.readShort()` Reads two input bytes and returns a `short` value.
`int` | `DataInput.readUnsignedShort()` Reads two input bytes and returns an `int` value in the range `0` through `65535`.
`char` | `DataInput.readChar()` Reads an input `char` and returns the `char` value.
`int` | `DataInput.readInt()` Reads four input bytes and returns an `int` value.
`long` | `DataInput.readLong()` Reads eight input bytes and returns a `long` value.
`float` | `DataInput.readFloat()` Reads four input bytes and returns a `float` value.
`double` | `DataInput.readDouble()` Reads eight input bytes and returns a `double` value.
`String` | `DataInput.readLine()` Reads the next line of text from the input stream.
`String` | `DataInput.readUTF()` Reads in a string that has been encoded using a modified UTF-8 format.
`protected void` | `ObjectOutputStream.writeObjectOverride(Object obj)` Method used by subclasses to override the default writeObject method.
`void` | `ObjectOutputStream.useProtocolVersion(int version)` Specify stream protocol version to use when writing the stream.
`void` | `ObjectOutputStream.writeObject(Object obj)` Write the specified object to the ObjectOutputStream.
`void` | `ObjectOutputStream.defaultWriteObject()` Write the non-static and non-transient fields of the current class to this stream.
`ObjectOutputStream.PutField` | `ObjectOutputStream.putFields()` Retrieve the object used to buffer persistent fields to be written to the stream.
`void` | `ObjectOutputStream.writeFields()` Write the buffered fields to the stream.
`void` | `ObjectOutputStream.reset()` Reset will disregard the state of any objects already written to the stream.
`protected void` | `ObjectOutputStream.annotateClass(Class cl)` Subclasses may implement this method to allow class data to be stored in the stream.
`protected void` | `ObjectOutputStream.annotateProxyClass(Class cl)` Subclasses may implement this method to store custom data in the stream along with descriptors for dynamic proxy classes.
`protected Object` | `ObjectOutputStream.replaceObject(Object obj)` This method will allow trusted subclasses of ObjectOutputStream to substitute one object for another during serialization.
`protected void` | `ObjectOutputStream.writeStreamHeader()` The writeStreamHeader method is provided so subclasses can append or prepend their own header to the stream.
`protected void` | `ObjectOutputStream.writeClassDescriptor(ObjectStreamClass classdesc)` Write the specified class descriptor to the ObjectOutputStream.
`void` | `ObjectOutputStream.write(int data)` Writes a byte.
`void` | `ObjectOutputStream.write(byte[] b)` Writes an array of bytes.
`void` | `ObjectOutputStream.write(byte[] b, int off, int len)` Writes a sub array of bytes.
`void` | `ObjectOutputStream.flush()` Flushes the stream.
`protected void` | `ObjectOutputStream.drain()` Drain any buffered data in ObjectOutputStream.
`void` | `ObjectOutputStream.close()` Closes the stream.
`void` | `ObjectOutputStream.writeBoolean(boolean data)` Writes a boolean.
`void` | `ObjectOutputStream.writeByte(int data)` Writes an 8 bit byte.
`void` | `ObjectOutputStream.writeShort(int data)` Writes a 16 bit short.
`void` | `ObjectOutputStream.writeChar(int data)` Writes a 16 bit char.
`void` | `ObjectOutputStream.writeInt(int data)` Writes a 32 bit int.
`void` | `ObjectOutputStream.writeLong(long data)` Writes a 64 bit long.
`void` | `ObjectOutputStream.writeFloat(float data)` Writes a 32 bit float.
`void` | `ObjectOutputStream.writeDouble(double data)` Writes a 64 bit double.
`void` | `ObjectOutputStream.writeBytes(String data)` Writes a String as a sequence of bytes.
`void` | `ObjectOutputStream.writeChars(String data)` Writes a String as a sequence of chars.
`void` | `ObjectOutputStream.writeUTF(String s)` Primitive data write of this String in UTF format.
`abstract void` | `ObjectOutputStream.PutField.write(ObjectOutput out)` Write the data and fields to the specified ObjectOutput stream.
`int` | `BufferedInputStream.read()` See the general contract of the `read` method of `InputStream`.
`int` | `BufferedInputStream.read(byte[] b, int off, int len)` Reads bytes from this byte-input stream into the specified byte array, starting at the given offset.
`long` | `BufferedInputStream.skip(long n)` See the general contract of the `skip` method of `InputStream`.
`int` | `BufferedInputStream.available()` Returns the number of bytes that can be read from this input stream without blocking.
`void` | `BufferedInputStream.reset()` See the general contract of the `reset` method of `InputStream`.
`void` | `BufferedInputStream.close()` Closes this input stream and releases any system resources associated with the stream.
`void` | `BufferedOutputStream.write(int b)` Writes the specified byte to this buffered output stream.
`void` | `BufferedOutputStream.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this buffered output stream.
`void` | `BufferedOutputStream.flush()` Flushes this buffered output stream.
`void` | `ByteArrayInputStream.close()` Closes this input stream and releases any system resources associated with the stream.
`int` | `CharArrayReader.read()` Read a single character.
`int` | `CharArrayReader.read(char[] b, int off, int len)` Read characters into a portion of an array.
`long` | `CharArrayReader.skip(long n)` Skip characters.
`boolean` | `CharArrayReader.ready()` Tell whether this stream is ready to be read.
`void` | `CharArrayReader.mark(int readAheadLimit)` Mark the present position in the stream.
`void` | `CharArrayReader.reset()` Reset the stream to the most recent mark, or to the beginning if it has never been marked.
`void` | `CharArrayWriter.writeTo(Writer out)` Writes the contents of the buffer to another character stream.
`FileDescriptor` | `RandomAccessFile.getFD()` Returns the opaque file descriptor object associated with this stream.
`int` | `RandomAccessFile.read()` Reads a byte of data from this file.
`int` | `RandomAccessFile.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this file into an array of bytes.
`int` | `RandomAccessFile.read(byte[] b)` Reads up to `b.length` bytes of data from this file into an array of bytes.
`void` | `RandomAccessFile.readFully(byte[] b)` Reads `b.length` bytes from this file into the byte array, starting at the current file pointer.
`void` | `RandomAccessFile.readFully(byte[] b, int off, int len)` Reads exactly `len` bytes from this file into the byte array, starting at the current file pointer.
`int` | `RandomAccessFile.skipBytes(int n)` Attempts to skip over `n` bytes of input discarding the skipped bytes.
`void` | `RandomAccessFile.write(int b)` Writes the specified byte to this file.
`void` | `RandomAccessFile.write(byte[] b)` Writes `b.length` bytes from the specified byte array to this file, starting at the current file pointer.
`void` | `RandomAccessFile.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this file.
`long` | `RandomAccessFile.getFilePointer()` Returns the current offset in this file.
`void` | `RandomAccessFile.seek(long pos)` Sets the file-pointer offset, measured from the beginning of this file, at which the next read or write occurs.
`long` | `RandomAccessFile.length()` Returns the length of this file.
`void` | `RandomAccessFile.setLength(long newLength)` Sets the length of this file.
`void` | `RandomAccessFile.close()` Closes this random access file stream and releases any system resources associated with the stream.
`boolean` | `RandomAccessFile.readBoolean()` Reads a `boolean` from this file.
`byte` | `RandomAccessFile.readByte()` Reads a signed eight-bit value from this file.
`int` | `RandomAccessFile.readUnsignedByte()` Reads an unsigned eight-bit number from this file.
`short` | `RandomAccessFile.readShort()` Reads a signed 16-bit number from this file.
`int` | `RandomAccessFile.readUnsignedShort()` Reads an unsigned 16-bit number from this file.
`char` | `RandomAccessFile.readChar()` Reads a Unicode character from this file.
`int` | `RandomAccessFile.readInt()` Reads a signed 32-bit integer from this file.
`long` | `RandomAccessFile.readLong()` Reads a signed 64-bit integer from this file.
`float` | `RandomAccessFile.readFloat()` Reads a `float` from this file.
`double` | `RandomAccessFile.readDouble()` Reads a `double` from this file.
`String` | `RandomAccessFile.readLine()` Reads the next line of text from this file.
`String` | `RandomAccessFile.readUTF()` Reads in a string from this file.
`void` | `RandomAccessFile.writeBoolean(boolean v)` Writes a `boolean` to the file as a one-byte value.
`void` | `RandomAccessFile.writeByte(int v)` Writes a `byte` to the file as a one-byte value.
`void` | `RandomAccessFile.writeShort(int v)` Writes a `short` to the file as two bytes, high byte first.
`void` | `RandomAccessFile.writeChar(int v)` Writes a `char` to the file as a two-byte value, high byte first.
`void` | `RandomAccessFile.writeInt(int v)` Writes an `int` to the file as four bytes, high byte first.
`void` | `RandomAccessFile.writeLong(long v)` Writes a `long` to the file as eight bytes, high byte first.
`void` | `RandomAccessFile.writeFloat(float v)` Converts the float argument to an `int` using the `floatToIntBits` method in class `Float`, and then writes that `int` value to the file as a four-byte quantity, high byte first.
`void` | `RandomAccessFile.writeDouble(double v)` Converts the double argument to a `long` using the `doubleToLongBits` method in class `Double`, and then writes that `long` value to the file as an eight-byte quantity, high byte first.
`void` | `RandomAccessFile.writeBytes(String s)` Writes the string to the file as a sequence of bytes.
`void` | `RandomAccessFile.writeChars(String s)` Writes a string to the file as a sequence of characters.
`void` | `RandomAccessFile.writeUTF(String str)` Writes a string to the file using UTF-8 encoding in a machine-independent manner.
`void` | `PipedOutputStream.connect(PipedInputStream snk)` Connects this piped output stream to a receiver.
`void` | `PipedOutputStream.write(int b)` Writes the specified `byte` to the piped output stream.
`void` | `PipedOutputStream.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this piped output stream.
`void` | `PipedOutputStream.flush()` Flushes this output stream and forces any buffered output bytes to be written out.
`void` | `PipedOutputStream.close()` Closes this piped output stream and releases any system resources associated with this stream.
`void` | `ByteArrayOutputStream.writeTo(OutputStream out)` Writes the complete contents of this byte array output stream to the specified output stream argument, as if by calling the output stream's write method using `out.write(buf, 0, count)`.
`void` | `ByteArrayOutputStream.close()` Closes this output stream and releases any system resources associated with this stream.
`int` | `SequenceInputStream.available()` Returns the number of bytes available on the current stream.
`int` | `SequenceInputStream.read()` Reads the next byte of data from this input stream.
`int` | `SequenceInputStream.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this input stream into an array of bytes.
`void` | `SequenceInputStream.close()` Closes this input stream and releases any system resources associated with the stream.
`int` | `DataInputStream.read(byte[] b)` See the general contract of the `read` method of `DataInput`.
`int` | `DataInputStream.read(byte[] b, int off, int len)` See the general contract of the `read` method of `DataInput`.
`void` | `DataInputStream.readFully(byte[] b)` See the general contract of the `readFully` method of `DataInput`.
`void` | `DataInputStream.readFully(byte[] b, int off, int len)` See the general contract of the `readFully` method of `DataInput`.
`int` | `DataInputStream.skipBytes(int n)` See the general contract of the `skipBytes` method of `DataInput`.
`boolean` | `DataInputStream.readBoolean()` See the general contract of the `readBoolean` method of `DataInput`.
`byte` | `DataInputStream.readByte()` See the general contract of the `readByte` method of `DataInput`.
`int` | `DataInputStream.readUnsignedByte()` See the general contract of the `readUnsignedByte` method of `DataInput`.
`short` | `DataInputStream.readShort()` See the general contract of the `readShort` method of `DataInput`.
`int` | `DataInputStream.readUnsignedShort()` See the general contract of the `readUnsignedShort` method of `DataInput`.
`char` | `DataInputStream.readChar()` See the general contract of the `readChar` method of `DataInput`.
`int` | `DataInputStream.readInt()` See the general contract of the `readInt` method of `DataInput`.
`long` | `DataInputStream.readLong()` See the general contract of the `readLong` method of `DataInput`.
`float` | `DataInputStream.readFloat()` See the general contract of the `readFloat` method of `DataInput`.
`double` | `DataInputStream.readDouble()` See the general contract of the `readDouble` method of `DataInput`.
> `String` | `DataInputStream.readLine()` Deprecated. This method does not properly convert bytes to characters. As of JDK 1.1, the preferred way to read lines of text is via the `BufferedReader.readLine()` method. Programs that use the `DataInputStream` class to read lines can be converted to use the `BufferedReader` class by replacing code of the form:
>          DataInputStream d = new DataInputStream(in);
> with:
>          BufferedReader d
>               = new BufferedReader(new InputStreamReader(in));
`String` | `DataInputStream.readUTF()` See the general contract of the `readUTF` method of `DataInput`.
`static String` | `DataInputStream.readUTF(DataInput in)` Reads from the stream `in` a representation of a Unicode character string encoded in Java modified UTF-8 format; this string of characters is then returned as a `String`.
`void` | `BufferedWriter.write(int c)` Write a single character.
`void` | `BufferedWriter.write(char[] cbuf, int off, int len)` Write a portion of an array of characters.
`void` | `BufferedWriter.write(String s, int off, int len)` Write a portion of a String.
`void` | `BufferedWriter.newLine()` Write a line separator.
`void` | `BufferedWriter.flush()` Flush the stream.
`void` | `BufferedWriter.close()` Close the stream.
`int` | `FileInputStream.read()` Reads a byte of data from this input stream.
`int` | `FileInputStream.read(byte[] b)` Reads up to `b.length` bytes of data from this input stream into an array of bytes.
`int` | `FileInputStream.read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this input stream into an array of bytes.
`long` | `FileInputStream.skip(long n)` Skips over and discards `n` bytes of data from the input stream.
`int` | `FileInputStream.available()` Returns the number of bytes that can be read from this file input stream without blocking.
`void` | `FileInputStream.close()` Closes this file input stream and releases any system resources associated with the stream.
`FileDescriptor` | `FileInputStream.getFD()` Returns the `FileDescriptor` object that represents the connection to the actual file in the file system being used by this `FileInputStream`.
`protected void` | `FileInputStream.finalize()` Ensures that the `close` method of this file input stream is called when there are no more references to it.

Constructors in java.io that throw IOException
`PipedReader(PipedWriter src)` Creates a `PipedReader` so that it is connected to the piped writer `src`.
`PipedWriter(PipedReader snk)` Creates a piped writer connected to the specified piped reader.
`ObjectInputStream(InputStream in)` Create an ObjectInputStream that reads from the specified InputStream.
`ObjectInputStream()` Provide a way for subclasses that are completely reimplementing ObjectInputStream to not have to allocate private data just used by this implementation of ObjectInputStream.
`PipedInputStream(PipedOutputStream src)` Creates a `PipedInputStream` so that it is connected to the piped output stream `src`.
`FileWriter(String fileName)` Constructs a FileWriter object given a file name.
`FileWriter(String fileName, boolean append)` Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.
`FileWriter(File file)` Constructs a FileWriter object given a File object.
`ObjectOutputStream(OutputStream out)` Creates an ObjectOutputStream that writes to the specified OutputStream.
`ObjectOutputStream()` Provide a way for subclasses that are completely reimplementing ObjectOutputStream to not have to allocate private data just used by this implementation of ObjectOutputStream.
`PipedOutputStream(PipedInputStream snk)` Creates a piped output stream connected to the specified piped input stream.

Uses of IOException in java.lang

Methods in java.lang that throw IOException
`Process` | `Runtime.exec(String command)` Executes the specified string command in a separate process.
`Process` | `Runtime.exec(String cmd, String[] envp)` Executes the specified string command in a separate process with the specified environment.
`Process` | `Runtime.exec(String command, String[] envp, File dir)` Executes the specified string command in a separate process with the specified environment and working directory.
`Process` | `Runtime.exec(String[] cmdarray)` Executes the specified command and arguments in a separate process.
`Process` | `Runtime.exec(String[] cmdarray, String[] envp)` Executes the specified command and arguments in a separate process with the specified environment.
`Process` | `Runtime.exec(String[] cmdarray, String[] envp, File dir)` Executes the specified command and arguments in a separate process with the specified environment and working directory.
`Enumeration` | `ClassLoader.getResources(String name)` Finds all the resources with the given name.
`protected Enumeration` | `ClassLoader.findResources(String name)` Returns an Enumeration of URLs representing all the resources with the given name.
`static Enumeration` | `ClassLoader.getSystemResources(String name)` Finds all resources of the specified name from the search path used to load classes.

Uses of IOException in java.net

Subclasses of IOException in java.net
`class` | `ConnectException` Signals that an error occurred while attempting to connect a socket to a remote address and port.
`class` | `MalformedURLException` Thrown to indicate that a malformed URL has occurred.
`class` | `ProtocolException` Thrown to indicate that there is an error in the underlying protocol, such as a TCP error.
`class` | `SocketException` Thrown to indicate that there is an error in the underlying protocol, such as a TCP error.
`class` | `UnknownHostException` Thrown to indicate that the IP address of a host could not be determined.
`class` | `UnknownServiceException` Thrown to indicate that an unknown service exception has occurred.

Methods in java.net that throw IOException
`Enumeration` | `URLClassLoader.findResources(String name)` Returns an Enumeration of URLs representing all of the resources on the URL search path having the specified name.
`void` | `DatagramSocket.send(DatagramPacket p)` Sends a datagram packet from this socket.
`void` | `DatagramSocket.receive(DatagramPacket p)` Receives a datagram packet from this socket.
`static void` | `DatagramSocket.setDatagramSocketImplFactory(DatagramSocketImplFactory fac)` Sets the datagram socket implementation factory for the application.
`abstract void` | `URLConnection.connect()` Opens a communications link to the resource referenced by this URL, if such a connection has not already been established.
`Object` | `URLConnection.getContent()` Retrieves the contents of this URL connection.
`Object` | `URLConnection.getContent(Class[] classes)` Retrieves the contents of this URL connection.
`Permission` | `URLConnection.getPermission()` Returns a permission object representing the permission necessary to make the connection represented by this object.
`InputStream` | `URLConnection.getInputStream()` Returns an input stream that reads from this open connection.
`OutputStream` | `URLConnection.getOutputStream()` Returns an output stream that writes to this connection.
`static String` | `URLConnection.guessContentTypeFromStream(InputStream is)` Tries to determine the type of an input stream based on the characters at the beginning of the input stream.
`abstract JarFile` | `JarURLConnection.getJarFile()` Return the JAR file for this connection.
`Manifest` | `JarURLConnection.getManifest()` Returns the Manifest for this connection, or null if none.
`JarEntry` | `JarURLConnection.getJarEntry()` Return the JAR entry object for this connection, if any.
`Attributes` | `JarURLConnection.getAttributes()` Return the Attributes object for this connection if the URL for it points to a JAR file entry, null otherwise.
`Attributes` | `JarURLConnection.getMainAttributes()` Returns the main Attributes for the JAR file for this connection.
`Certificate[]` | `JarURLConnection.getCertificates()` Return the Certificate object for this connection if the URL for it points to a JAR file entry, null otherwise.
`protected abstract void` | `SocketImpl.create(boolean stream)` Creates either a stream or a datagram socket.
`protected abstract void` | `SocketImpl.connect(String host, int port)` Connects this socket to the specified port on the named host.
`protected abstract void` | `SocketImpl.connect(InetAddress address, int port)` Connects this socket to the specified port number on the specified host.
`protected abstract void` | `SocketImpl.bind(InetAddress host, int port)` Binds this socket to the specified port number on the specified host.
`protected abstract void` | `SocketImpl.listen(int backlog)` Sets the maximum queue length for incoming connection indications (a request to connect) to the `count` argument.
`protected abstract void` | `SocketImpl.accept(SocketImpl s)` Accepts a connection.
`protected abstract InputStream` | `SocketImpl.getInputStream()` Returns an input stream for this socket.
`protected abstract OutputStream` | `SocketImpl.getOutputStream()` Returns an output stream for this socket.
`protected abstract int` | `SocketImpl.available()` Returns the number of bytes that can be read from this socket without blocking.
`protected abstract void` | `SocketImpl.close()` Closes this socket.
`protected void` | `SocketImpl.shutdownInput()` Places the input stream for this socket at "end of stream".
`protected void` | `SocketImpl.shutdownOutput()` Disables the output stream for this socket.
`InputStream` | `Socket.getInputStream()` Returns an input stream for this socket.
`OutputStream` | `Socket.getOutputStream()` Returns an output stream for this socket.
`void` | `Socket.close()` Closes this socket.
`void` | `Socket.shutdownInput()` Places the input stream for this socket at "end of stream".
`void` | `Socket.shutdownOutput()` Disables the output stream for this socket.
`static void` | `Socket.setSocketImplFactory(SocketImplFactory fac)` Sets the client socket implementation factory for the application.
`void` | `MulticastSocket.setTimeToLive(int ttl)` Set the default time-to-live for multicast packets sent out on this socket.
`int` | `MulticastSocket.getTimeToLive()` Get the default time-to-live for multicast packets sent out on the socket.
`void` | `MulticastSocket.joinGroup(InetAddress mcastaddr)` Joins a multicast group.Its behavior may be affected by `setInterface`.
`void` | `MulticastSocket.leaveGroup(InetAddress mcastaddr)` Leave a multicast group.
`void` | `MulticastSocket.send(DatagramPacket p, byte ttl)` Sends a datagram packet to the destination, with a TTL (time- to-live) other than the default for the socket.
`URLConnection` | `URL.openConnection()` Returns a `URLConnection` object that represents a connection to the remote object referred to by the `URL`.
`InputStream` | `URL.openStream()` Opens a connection to this `URL` and returns an `InputStream` for reading from that connection.
`Object` | `URL.getContent()` Returns the contents of this URL.
`Object` | `URL.getContent(Class[] classes)` Returns the contents of this URL.
`int` | `HttpURLConnection.getResponseCode()` Gets HTTP response status from responses like:
`String` | `HttpURLConnection.getResponseMessage()` Gets the HTTP response message, if any, returned along with the response code from a server.
`Permission` | `HttpURLConnection.getPermission()`
`Socket` | `ServerSocket.accept()` Listens for a connection to be made to this socket and accepts it.
`protected void` | `ServerSocket.implAccept(Socket s)` Subclasses of ServerSocket use this method to override accept() to return their own subclass of socket.
`void` | `ServerSocket.close()` Closes this socket.
`int` | `ServerSocket.getSoTimeout()` Retrive setting for SO_TIMEOUT.
`static void` | `ServerSocket.setSocketFactory(SocketImplFactory fac)` Sets the server socket implementation factory for the application.
`protected abstract void` | `DatagramSocketImpl.send(DatagramPacket p)` Sends a datagram packet.
`protected abstract int` | `DatagramSocketImpl.peek(InetAddress i)` Peek at the packet to see who it is from.
`protected abstract void` | `DatagramSocketImpl.receive(DatagramPacket p)` Receive the datagram packet.
`protected abstract void` | `DatagramSocketImpl.setTimeToLive(int ttl)` Set the TTL (time-to-live) option.
`protected abstract int` | `DatagramSocketImpl.getTimeToLive()` Retrieve the TTL (time-to-live) option.
`protected abstract void` | `DatagramSocketImpl.join(InetAddress inetaddr)` Join the multicast group.
`protected abstract void` | `DatagramSocketImpl.leave(InetAddress inetaddr)` Leave the multicast group.
`protected abstract URLConnection` | `URLStreamHandler.openConnection(URL u)` Opens a connection to the object referenced by the `URL` argument.
`abstract Object` | `ContentHandler.getContent(URLConnection urlc)` Given a URL connect stream positioned at the beginning of the representation of an object, this method reads that stream and creates an object from it.
`Object` | `ContentHandler.getContent(URLConnection urlc, Class[] classes)` Given a URL connect stream positioned at the beginning of the representation of an object, this method reads that stream and creates an object that matches one of the types specified.

Constructors in java.net that throw IOException
`Socket(String host, int port)` Creates a stream socket and connects it to the specified port number on the named host.
`Socket(InetAddress address, int port)` Creates a stream socket and connects it to the specified port number at the specified IP address.
`Socket(String host, int port, InetAddress localAddr, int localPort)` Creates a socket and connects it to the specified remote host on the specified remote port.
`Socket(InetAddress address, int port, InetAddress localAddr, int localPort)` Creates a socket and connects it to the specified remote address on the specified remote port.
`MulticastSocket()` Create a multicast socket.
`MulticastSocket(int port)` Create a multicast socket and bind it to a specific port.
`ServerSocket(int port)` Creates a server socket on a specified port.
`ServerSocket(int port, int backlog)` Creates a server socket and binds it to the specified local port number, with the specified backlog.
`ServerSocket(int port, int backlog, InetAddress bindAddr)` Create a server with the specified port, listen backlog, and local IP address to bind to.

Uses of IOException in java.security

Methods in java.security that throw IOException
`void` | `Provider.load(InputStream inStream)` Reads a property list (key and element pairs) from the input stream.
`void` | `Certificate.encode(OutputStream stream)` Deprecated. Encodes the certificate to an output stream in a format that can be decoded by the `decode` method.
`void` | `Certificate.decode(InputStream stream)` Deprecated. Decodes a certificate from an input stream.
`void` | `AlgorithmParameters.init(byte[] params)` Imports the specified parameters and decodes them according to the primary decoding format for parameters.
`void` | `AlgorithmParameters.init(byte[] params, String format)` Imports the parameters from `params` and decodes them according to the specified decoding scheme.
`byte[]` | `AlgorithmParameters.getEncoded()` Returns the parameters in their primary encoding format.
`byte[]` | `AlgorithmParameters.getEncoded(String format)` Returns the parameters encoded in the specified scheme.
`void` | `KeyStore.store(OutputStream stream, char[] password)` Stores this keystore to the given output stream, and protects its integrity with the given password.
`void` | `KeyStore.load(InputStream stream, char[] password)` Loads this KeyStore from the given input stream.
`abstract void` | `KeyStoreSpi.engineStore(OutputStream stream, char[] password)` Stores this keystore to the given output stream, and protects its integrity with the given password.
`abstract void` | `KeyStoreSpi.engineLoad(InputStream stream, char[] password)` Loads the keystore from the given input stream.
`void` | `DigestOutputStream.write(int b)` Updates the message digest (if the digest function is on) using the specified byte, and in any case writes the byte to the output stream.
`void` | `DigestOutputStream.write(byte[] b, int off, int len)` Updates the message digest (if the digest function is on) using the specified subarray, and in any case writes the subarray to the output stream.
`int` | `DigestInputStream.read()` Reads a byte, and updates the message digest (if the digest function is on).
`int` | `DigestInputStream.read(byte[] b, int off, int len)` Reads into a byte array, and updates the message digest (if the digest function is on).
`protected abstract void` | `AlgorithmParametersSpi.engineInit(byte[] params)` Imports the specified parameters and decodes them according to the primary decoding format for parameters.
`protected abstract void` | `AlgorithmParametersSpi.engineInit(byte[] params, String format)` Imports the parameters from `params` and decodes them according to the specified decoding format.
`protected abstract byte[]` | `AlgorithmParametersSpi.engineGetEncoded()` Returns the parameters in their primary encoding format.
`protected abstract byte[]` | `AlgorithmParametersSpi.engineGetEncoded(String format)` Returns the parameters encoded in the specified format.

Uses of IOException in java.util

Methods in java.util that throw IOException
`void` | `Properties.load(InputStream inStream)` Reads a property list (key and element pairs) from the input stream.
`void` | `Properties.store(OutputStream out, String header)` Writes this property list (key and element pairs) in this `Properties` table to the output stream in a format suitable for loading into a `Properties` table using the `load` method.

Constructors in java.util that throw IOException
`PropertyResourceBundle(InputStream stream)` Creates a property resource

Uses of IOException in java.util.jar

Subclasses of IOException in java.util.jar
`class` | `JarException` Signals that an error of some sort has occurred while reading from or writing to a JAR file.

Methods in java.util.jar that throw IOException
`ZipEntry` | `JarInputStream.getNextEntry()` Reads the next ZIP file entry and positions stream at the beginning of the entry data.
`JarEntry` | `JarInputStream.getNextJarEntry()` Reads the next JAR file entry and positions the stream at the beginning of the entry data.
`int` | `JarInputStream.read(byte[] b, int off, int len)` Reads from the current JAR file entry into an array of bytes.
`void` | `Manifest.write(OutputStream out)` Writes the Manifest to the specified OutputStream.
`void` | `Manifest.read(InputStream is)` Reads the Manifest from the specified InputStream.
`Attributes` | `JarEntry.getAttributes()` Returns the `Manifest` `Attributes` for this entry, or `null` if none.
`Manifest` | `JarFile.getManifest()` Returns the JAR file manifest, or `null` if none.
`InputStream` | `JarFile.getInputStream(ZipEntry ze)` Returns an input stream for reading the contents of the specified ZIP file entry.
`void` | `JarOutputStream.putNextEntry(ZipEntry ze)` Begins writing a new JAR file entry and positions the stream to the start of the entry data.

Constructors in java.util.jar that throw IOException
`JarInputStream(InputStream in)` Creates a new `JarInputStream` and reads the optional manifest.
`JarInputStream(InputStream in, boolean verify)` Creates a new `JarInputStream` and reads the optional manifest.
`Manifest(InputStream is)` Constructs a new Manifest from the specified input stream.
`JarFile(String name)` Creates a new `JarFile` to read from the specified file `name`.
`JarFile(String name, boolean verify)` Creates a new `JarFile` to read from the specified file `name`.
`JarFile(File file)` Creates a new `JarFile` to read from the specified `File` object.
`JarFile(File file, boolean verify)` Creates a new `JarFile` to read from the specified `File` object.
`JarFile(File file, boolean verify, int mode)` Creates a new `JarFile` to read from the specified `File` object in the specified mode.
`JarOutputStream(OutputStream out, Manifest man)` Creates a new `JarOutputStream` with the specified `Manifest`.
`JarOutputStream(OutputStream out)` Creates a new `JarOutputStream` with no manifest.

Uses of IOException in java.util.zip

Subclasses of IOException in java.util.zip
`class` | `ZipException` Signals that a Zip exception of some sort has occurred.

Methods in java.util.zip that throw IOException
`int` | `InflaterInputStream.read()` Reads a byte of uncompressed data.
`int` | `InflaterInputStream.read(byte[] b, int off, int len)` Reads uncompressed data into an array of bytes.
`int` | `InflaterInputStream.available()` Returns 0 after EOF has reached, otherwise always return 1.
`long` | `InflaterInputStream.skip(long n)` Skips specified number of bytes of uncompressed data.
`void` | `InflaterInputStream.close()` Closes the input stream.
`protected void` | `InflaterInputStream.fill()` Fills input buffer with more data to decompress.
`ZipEntry` | `ZipInputStream.getNextEntry()` Reads the next ZIP file entry and positions stream at the beginning of the entry data.
`void` | `ZipInputStream.closeEntry()` Closes the current ZIP entry and positions the stream for reading the next entry.
`int` | `ZipInputStream.available()` Returns 0 after EOF has reached for the current entry data, otherwise always return 1.
`int` | `ZipInputStream.read(byte[] b, int off, int len)` Reads from the current ZIP entry into an array of bytes.
`long` | `ZipInputStream.skip(long n)` Skips specified number of bytes in the current ZIP entry.
`void` | `ZipInputStream.close()` Closes the ZIP input stream.
`InputStream` | `ZipFile.getInputStream(ZipEntry entry)` Returns an input stream for reading the contents of the specified zip file entry.
`void` | `ZipFile.close()` Closes the ZIP file.
`protected void` | `ZipFile.finalize()` Ensures that the `close` method of this ZIP file is called when there are no more references to it.
`void` | `DeflaterOutputStream.write(int b)` Writes a byte to the compressed output stream.
`void` | `DeflaterOutputStream.write(byte[] b, int off, int len)` Writes an array of bytes to the compressed output stream.
`void` | `DeflaterOutputStream.finish()` Finishes writing compressed data to the output stream without closing the underlying stream.
`void` | `DeflaterOutputStream.close()` Writes remaining compressed data to the output stream and closes the underlying stream.
`protected void` | `DeflaterOutputStream.deflate()` Writes next block of compressed data to the output stream.
`void` | `ZipOutputStream.putNextEntry(ZipEntry e)` Begins writing a new ZIP file entry and positions the stream to the start of the entry data.
`void` | `ZipOutputStream.closeEntry()` Closes the current ZIP entry and positions the stream for writing the next entry.
`void` | `ZipOutputStream.write(byte[] b, int off, int len)` Writes an array of bytes to the current ZIP entry data.
`void` | `ZipOutputStream.finish()` Finishes writing the contents of the ZIP output stream without closing the underlying stream.
`void` | `ZipOutputStream.close()` Closes the ZIP output stream as well as the stream being filtered.
`void` | `CheckedOutputStream.write(int b)` Writes a byte.
`void` | `CheckedOutputStream.write(byte[] b, int off, int len)` Writes an array of bytes.
`int` | `GZIPInputStream.read(byte[] buf, int off, int len)` Reads uncompressed data into an array of bytes.
`void` | `GZIPInputStream.close()` Closes the input stream.
`void` | `GZIPOutputStream.write(byte[] buf, int off, int len)` Writes array of bytes to the compressed output stream.
`void` | `GZIPOutputStream.finish()` Finishes writing compressed data to the output stream without closing the underlying stream.
`void` | `GZIPOutputStream.close()` Writes remaining compressed data to the output stream and closes the underlying stream.

Constructors in java.util.zip that throw IOException
`ZipFile(String name)` Opens a zip file for reading.
`ZipFile(File file, int mode)` Opens a new `ZipFile` to read from the specified `File` object in the specified mode.
`ZipFile(File file)` Opens a ZIP file for reading given the specified File object.
`GZIPInputStream(InputStream in, int size)` Creates a new input stream with the specified buffer size.
`GZIPInputStream(InputStream in)` Creates a new input stream with a default buffer size.
`GZIPOutputStream(OutputStream out, int size)` Creates a new output stream with the specified buffer size.
`GZIPOutputStream(OutputStream out)` Creates a new output stream with a default buffer size.

Uses of IOException in javax.microedition.io

Subclasses of IOException in javax.microedition.io
`class` | `ConnectionNotFoundException` This class is used to signal that a connection target cannot be found

Methods in javax.microedition.io that throw IOException
`static Connection` | `Connector.open(String name)` Create and open a Connection
`static Connection` | `Connector.open(String name, int mode)` Create and open a Connection
`static Connection` | `Connector.open(String name, int mode, boolean timeouts)` Create and open a Connection
`static DataInputStream` | `Connector.openDataInputStream(String name)` Create and open a connection input stream
`static DataOutputStream` | `Connector.openDataOutputStream(String name)` Create and open a connection output stream
`static InputStream` | `Connector.openInputStream(String name)` Create and open a connection input stream
`static OutputStream` | `Connector.openOutputStream(String name)` Create and open a connection output stream
`InputStream` | `InputConnection.openInputStream()` Open and return an input stream for a connection.
`DataInputStream` | `InputConnection.openDataInputStream()` Open and return a data input stream for a connection.
`int` | `DatagramConnection.getMaximumLength()` Get the maximum length a datagram can be.
`int` | `DatagramConnection.getNominalLength()` Get the nominal length of a datagram.
`void` | `DatagramConnection.send(Datagram dgram)` Send a datagram
`void` | `DatagramConnection.receive(Datagram dgram)` Receive a datagram
`Datagram` | `DatagramConnection.newDatagram(int size)` Make a new datagram object automatically allocating a buffer
`Datagram` | `DatagramConnection.newDatagram(int size, String addr)` Make a new datagram object
`Datagram` | `DatagramConnection.newDatagram(byte[] buf, int size)` Make a new datagram object
`Datagram` | `DatagramConnection.newDatagram(byte[] buf, int size, String addr)` Make a new datagram object
`OutputStream` | `OutputConnection.openOutputStream()` Open and return an output stream for a connection.
`DataOutputStream` | `OutputConnection.openDataOutputStream()` Open and return a data output stream for a connection.
`boolean` | `RandomAccessConnection.isSelected()` Test to see if a record in the collection is selected.
`void` | `RandomAccessConnection.seek(long pos)` Sets the position pointer offset, measured from the beginning of the data, at which the next read or write occurs.
`long` | `RandomAccessConnection.getPosition()` Returns the current offset into the data.
`long` | `RandomAccessConnection.getLength()` Get the length of the data
`void` | `RandomAccessConnection.setLength(long len)` Set the length of the data (for truncation).
`int` | `RandomAccessConnection.read()` Reads a byte of data.
`int` | `RandomAccessConnection.read(byte[] b, int off, int len)` Reads up to `len` bytes of data into an array of bytes.
`void` | `RandomAccessConnection.write(int b)` Writes the specified byte to this file.
`void` | `RandomAccessConnection.write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to the data
`void` | `Datagram.setAddress(String addr)` Set datagram address.
`StreamConnection` | `StreamConnectionNotifier.acceptAndOpen()` Returns a `StreamConnection` that represents a server side socket connection
`void` | `Connection.close()` Close the connection.
`Connection` | `ConnectionBaseInterface.openPrim(String name, int mode, boolean timeouts)`
`long` | `DirectoryConnection.getAvailableSpace()` Return the size in bytes that the collection can grow to
`int` | `DirectoryConnection.getItemCount()` Return the number of items in the collection
`boolean` | `DirectoryConnection.selectFirstItem()` Select the first record int the database
`boolean` | `DirectoryConnection.selectNextItem()` Select the next record int the database
`boolean` | `DirectoryConnection.selectItem(String name)` Select an item in the collection
`boolean` | `DirectoryConnection.selectItem(int i)` Select an item in the collection
`void` | `DirectoryConnection.deselectItem()` Unselect the current item.
`boolean` | `DirectoryConnection.isDirectory()` Test to see if the current item is a directory
`void` | `DirectoryConnection.create()` Create a data item in the collection with a randomly chosen unique name and select it
`void` | `DirectoryConnection.create(String name)` Create a data item with the supplied name and select it
`void` | `DirectoryConnection.create(int i)` Create an item with the supplied number
`void` | `DirectoryConnection.createDirectory(String name)` Create a directory with the supplied name
`void` | `DirectoryConnection.delete()` Delete the current data item from the collection
`void` | `DirectoryConnection.deleteDirectory()` Delete a directory
`void` | `DirectoryConnection.rename(String newName)` Rename the current data item
`void` | `DirectoryConnection.renameDirectory(String to)` Rename a directory with the supplied name
`String` | `DirectoryConnection.getItemName()` Return the number of the current record
`int` | `DirectoryConnection.getItemNumber()` Return the number of the current item
`long` | `DirectoryConnection.getModificationDate()` Return the date that the item was last modified
`boolean` | `DirectoryConnection.canRead()` Test to see if the selected item can be read
`void` | `DirectoryConnection.setReadable(boolean tf)` Set or clear the read bit
`boolean` | `DirectoryConnection.canWrite()` Test to see if the selected item can be written
`void` | `DirectoryConnection.setWritable(boolean tf)` Set or clear the write bit

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