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## O

Object - class java.lang.Object.
  Class `Object` is the root of the class hierarchy.
Object() - Constructor for class java.lang.Object
ObjectInput - interface java.io.ObjectInput.
  ObjectInput extends the DataInput interface to include the reading of objects.
ObjectInputStream - class java.io.ObjectInputStream.
  An ObjectInputStream deserializes primitive data and objects previously written using an ObjectOutputStream.
ObjectInputStream.GetField - class java.io.ObjectInputStream.GetField.
  Provide access to the persistent fields read from the input stream.
ObjectInputStream.GetField() - Constructor for class java.io.ObjectInputStream.GetField
ObjectInputStream() - Constructor for class java.io.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.
ObjectInputStream(InputStream) - Constructor for class java.io.ObjectInputStream
  Create an ObjectInputStream that reads from the specified InputStream.
ObjectInputValidation - interface java.io.ObjectInputValidation.
  Callback interface to allow validation of objects within a graph.
ObjectOutput - interface java.io.ObjectOutput.
  ObjectOutput extends the DataOutput interface to include writing of objects.
ObjectOutputStream - class java.io.ObjectOutputStream.
  An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream.
ObjectOutputStream.PutField - class java.io.ObjectOutputStream.PutField.
  Provide programatic access to the persistent fields to be written to ObjectOutput.
ObjectOutputStream.PutField() - Constructor for class java.io.ObjectOutputStream.PutField
ObjectOutputStream() - Constructor for class java.io.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.
ObjectOutputStream(OutputStream) - Constructor for class java.io.ObjectOutputStream
  Creates an ObjectOutputStream that writes to the specified OutputStream.
ObjectStreamClass - class java.io.ObjectStreamClass.
  Serialization's descriptor for classes.
ObjectStreamConstants - interface java.io.ObjectStreamConstants.
  Constants written into the Object Serialization Stream.
ObjectStreamException - exception java.io.ObjectStreamException.
  Superclass of all exceptions specific to Object Stream classes.
ObjectStreamException() - Constructor for class java.io.ObjectStreamException
  Create an ObjectStreamException.
ObjectStreamException(String) - Constructor for class java.io.ObjectStreamException
  Create an ObjectStreamException with the specified argument.
ObjectStreamField - class java.io.ObjectStreamField.
  A description of a Serializable field from a Serializable class.
ObjectStreamField(String, Class) - Constructor for class java.io.ObjectStreamField
  Create a Serializable field with the specified type.
Observable - class java.util.Observable.
  This class represents an observable object, or "data" in the model-view paradigm.
Observable() - Constructor for class java.util.Observable
  Construct an Observable with zero Observers.
Observer - interface java.util.Observer.
  A class can implement the `Observer` interface when it wants to be informed of changes in observable objects.
OCTOBER - Static variable in class java.util.Calendar
  Value of the `MONTH` field indicating the tenth month of the year.
of(char) - Static method in class java.lang.Character.UnicodeBlock
  Returns the object representing the Unicode block containing the given character, or `null` if the character is not a member of a defined block.
on(boolean) - Method in class java.security.DigestOutputStream
  Turns the digest function on or off.
on(boolean) - Method in class java.security.DigestInputStream
  Turns the digest function on or off.
ONE - Static variable in class java.math.BigInteger
  The BigInteger constant one.
OPEN_DELETE - Static variable in class java.util.zip.ZipFile
  Mode flag to open a zip file and mark it for deletion.
OPEN_READ - Static variable in class java.util.zip.ZipFile
  Mode flag to open a zip file for reading.
open(String) - Static method in class javax.microedition.io.Connector
  Create and open a Connection
open(String, int) - Static method in class javax.microedition.io.Connector
  Create and open a Connection
open(String, int, boolean) - Static method in class javax.microedition.io.Connector
  Create and open a Connection
openConnection() - Method in class java.net.URL
  Returns a `URLConnection` object that represents a connection to the remote object referred to by the `URL`.
openConnection(URL) - Method in class java.net.URLStreamHandler
  Opens a connection to the object referenced by the `URL` argument.
openDataInputStream() - Method in interface javax.microedition.io.InputConnection
  Open and return a data input stream for a connection.
openDataInputStream(String) - Static method in class javax.microedition.io.Connector
  Create and open a connection input stream
openDataOutputStream() - Method in interface javax.microedition.io.OutputConnection
  Open and return a data output stream for a connection.
openDataOutputStream(String) - Static method in class javax.microedition.io.Connector
  Create and open a connection output stream
openInputStream() - Method in interface javax.microedition.io.InputConnection
  Open and return an input stream for a connection.
openInputStream(String) - Static method in class javax.microedition.io.Connector
  Create and open a connection input stream
openOutputStream() - Method in interface javax.microedition.io.OutputConnection
  Open and return an output stream for a connection.
openOutputStream(String) - Static method in class javax.microedition.io.Connector
  Create and open a connection output stream
openPrim(String, int, boolean) - Method in interface javax.microedition.io.ConnectionBaseInterface
openStream() - Method in class java.net.URL
  Opens a connection to this `URL` and returns an `InputStream` for reading from that connection.
OPTICAL_CHARACTER_RECOGNITION - Static variable in class java.lang.Character.UnicodeBlock
  Constant for the Unicode character block of the same name.
OptionalDataException - exception java.io.OptionalDataException.
  Unexpected data appeared in an ObjectInputStream trying to read an Object.
or(BigInteger) - Method in class java.math.BigInteger
  Returns a BigInteger whose value is `(this | val)`.
ordinaryChar(int) - Method in class java.io.StreamTokenizer
  Specifies that the character argument is "ordinary" in this tokenizer.
ordinaryChars(int, int) - Method in class java.io.StreamTokenizer
  Specifies that all characters c in the range `low <= c <= high` are "ordinary" in this tokenizer.
ORIYA - Static variable in class java.lang.Character.UnicodeBlock
  Constant for the Unicode character block of the same name.
OTHER_LETTER - Static variable in class java.lang.Character
  Public data for enumerated Unicode general category types.
OTHER_NUMBER - Static variable in class java.lang.Character
  Public data for enumerated Unicode general category types.
OTHER_PUNCTUATION - Static variable in class java.lang.Character
  Public data for enumerated Unicode general category types.
OTHER_SYMBOL - Static variable in class java.lang.Character
  Public data for enumerated Unicode general category types.
out - Variable in class java.io.FilterWriter
  The underlying character-output stream.
out - Variable in class java.io.FilterOutputStream
  The underlying output stream to be filtered.
out - Variable in class java.io.PipedInputStream
  The index of the position in the circular buffer at which the next byte of data will be read by this piped input stream.
out - Variable in class java.io.PrintWriter
  The underlying character-output stream of this `PrintWriter`.
out - Static variable in class java.io.FileDescriptor
  A handle to the standard output stream.
out - Static variable in class java.lang.System
  The "standard" output stream.
OutOfMemoryError - error java.lang.OutOfMemoryError.
  Thrown when the Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector.
OutOfMemoryError() - Constructor for class java.lang.OutOfMemoryError
  Constructs an `OutOfMemoryError` with no detail message.
OutOfMemoryError(String) - Constructor for class java.lang.OutOfMemoryError
  Constructs an `OutOfMemoryError` with the specified detail message.
OutputConnection - interface javax.microedition.io.OutputConnection.
  This interface defines the capabilities that an output stream connection must have.
OutputStream - class java.io.OutputStream.
  This abstract class is the superclass of all classes representing an output stream of bytes.
OutputStream() - Constructor for class java.io.OutputStream
OutputStreamWriter - class java.io.OutputStreamWriter.
  An OutputStreamWriter is a bridge from character streams to byte streams: Characters written to it are translated into bytes according to a specified character encoding.
OutputStreamWriter(OutputStream) - Constructor for class java.io.OutputStreamWriter
  Create an OutputStreamWriter that uses the default character encoding.
OutputStreamWriter(OutputStream, String) - Constructor for class java.io.OutputStreamWriter
  Create an OutputStreamWriter that uses the named character encoding.

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