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## java.util.zip
Class ZipFile

    java.lang.Object
      |
      +--java.util.zip.ZipFile

All Implemented Interfaces:
  java.util.zip.ZipConstants

Direct Known Subclasses:
  JarFile

public class ZipFile
extends Object
implements java.util.zip.ZipConstants

This class is used to read entries from a zip file.

Field Summary
`static int` | `CENATT`
`static int` | `CENATX`
`static int` | `CENCOM`
`static int` | `CENCRC`
`static int` | `CENDSK`
`static int` | `CENEXT`
`static int` | `CENFLG`
`static int` | `CENHDR`
`static int` | `CENHOW`
`static int` | `CENLEN`
`static int` | `CENNAM`
`static int` | `CENOFF`
`static long` | `CENSIG`
`static int` | `CENSIZ`
`static int` | `CENTIM`
`static int` | `CENVEM`
`static int` | `CENVER`
`static int` | `ENDCOM`
`static int` | `ENDHDR`
`static int` | `ENDOFF`
`static long` | `ENDSIG`
`static int` | `ENDSIZ`
`static int` | `ENDSUB`
`static int` | `ENDTOT`
`static int` | `EXTCRC`
`static int` | `EXTHDR`
`static int` | `EXTLEN`
`static long` | `EXTSIG`
`static int` | `EXTSIZ`
`static int` | `LOCCRC`
`static int` | `LOCEXT`
`static int` | `LOCFLG`
`static int` | `LOCHDR`
`static int` | `LOCHOW`
`static int` | `LOCLEN`
`static int` | `LOCNAM`
`static long` | `LOCSIG`
`static int` | `LOCSIZ`
`static int` | `LOCTIM`
`static int` | `LOCVER`
`static int` | `OPEN_DELETE` Mode flag to open a zip file and mark it for deletion.
`static int` | `OPEN_READ` Mode flag to open a zip file for reading.

Constructor Summary
`ZipFile(File file)` Opens a ZIP file for reading given the specified File object.
`ZipFile(File file, int mode)` Opens a new `ZipFile` to read from the specified `File` object in the specified mode.
`ZipFile(String name)` Opens a zip file for reading.

Method Summary
`void` | `close()` Closes the ZIP file.
`Enumeration` | `entries()` Returns an enumeration of the ZIP file entries.
`protected void` | `finalize()` Ensures that the `close` method of this ZIP file is called when there are no more references to it.
`ZipEntry` | `getEntry(String name)` Returns the zip file entry for the specified name, or null if not found.
`InputStream` | `getInputStream(ZipEntry entry)` Returns an input stream for reading the contents of the specified zip file entry.
`String` | `getName()` Returns the path name of the ZIP file.
`int` | `size()` Returns the number of entries in the ZIP file.

Methods inherited from class java.lang.Object
`clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### OPEN_READ

    public static final int OPEN_READ

  Mode flag to open a zip file for reading.

### OPEN_DELETE

    public static final int OPEN_DELETE

  Mode flag to open a zip file and mark it for deletion. The file will be deleted some time between the moment that it is opened and the moment that it is closed, but its contents will remain accessible via the `ZipFile` object until either the close method is invoked or the virtual machine exits.

### LOCSIG

    public static final long LOCSIG

### EXTSIG

    public static final long EXTSIG

### CENSIG

    public static final long CENSIG

### ENDSIG

    public static final long ENDSIG

### LOCHDR

    public static final int LOCHDR

### EXTHDR

    public static final int EXTHDR

### CENHDR

    public static final int CENHDR

### ENDHDR

    public static final int ENDHDR

### LOCVER

    public static final int LOCVER

### LOCFLG

    public static final int LOCFLG

### LOCHOW

    public static final int LOCHOW

### LOCTIM

    public static final int LOCTIM

### LOCCRC

    public static final int LOCCRC

### LOCSIZ

    public static final int LOCSIZ

### LOCLEN

    public static final int LOCLEN

### LOCNAM

    public static final int LOCNAM

### LOCEXT

    public static final int LOCEXT

### EXTCRC

    public static final int EXTCRC

### EXTSIZ

    public static final int EXTSIZ

### EXTLEN

    public static final int EXTLEN

### CENVEM

    public static final int CENVEM

### CENVER

    public static final int CENVER

### CENFLG

    public static final int CENFLG

### CENHOW

    public static final int CENHOW

### CENTIM

    public static final int CENTIM

### CENCRC

    public static final int CENCRC

### CENSIZ

    public static final int CENSIZ

### CENLEN

    public static final int CENLEN

### CENNAM

    public static final int CENNAM

### CENEXT

    public static final int CENEXT

### CENCOM

    public static final int CENCOM

### CENDSK

    public static final int CENDSK

### CENATT

    public static final int CENATT

### CENATX

    public static final int CENATX

### CENOFF

    public static final int CENOFF

### ENDSUB

    public static final int ENDSUB

### ENDTOT

    public static final int ENDTOT

### ENDSIZ

    public static final int ENDSIZ

### ENDOFF

    public static final int ENDOFF

### ENDCOM

    public static final int ENDCOM

Constructor Detail

### ZipFile

    public ZipFile(String name)
            throws IOException

  Opens a zip file for reading.

  First, if there is a security manager, its `checkRead` method is called with the `name` argument as its argument to ensure the read is allowed.

  Parameters:
    `name` - the name of the zip file
  Throws:
    `ZipException` - if a ZIP format error has occurred
    `IOException` - if an I/O error has occurred
    `SecurityException` - if a security manager exists and its `checkRead` method doesn't allow read access to the file.
  See Also:
    `SecurityManager.checkRead(java.lang.String)`

### ZipFile

    public ZipFile(File file,
                   int mode)
            throws IOException

  Opens a new `ZipFile` to read from the specified `File` object in the specified mode. The mode argument must be either `OPEN_READ` or `OPEN_READ | OPEN_DELETE`.

  First, if there is a security manager, its `checkRead` method is called with the `name` argument as its argument to ensure the read is allowed.

  Parameters:
    `file` - the ZIP file to be opened for reading
    `mode` - the mode in which the file is to be opened
  Throws:
    `ZipException` - if a ZIP format error has occurred
    `IOException` - if an I/O error has occurred
    `SecurityException` - if a security manager exists and its `checkRead` method doesn't allow read access to the file.
    `IllegalArgumentException` - If the `mode` argument is invalid
  See Also:
    `SecurityManager.checkRead(java.lang.String)`

### ZipFile

    public ZipFile(File file)
            throws ZipException,
                   IOException

  Opens a ZIP file for reading given the specified File object.
  Parameters:
    `file` - the ZIP file to be opened for reading
  Throws:
    `ZipException` - if a ZIP error has occurred
    `IOException` - if an I/O error has occurred

Method Detail

### getEntry

    public ZipEntry getEntry(String name)

  Returns the zip file entry for the specified name, or null if not found.
  Parameters:
    `name` - the name of the entry
  Returns:
    the zip file entry, or null if not found
  Throws:
    `IllegalStateException` - if the zip file has been closed

### getInputStream

    public InputStream getInputStream(ZipEntry entry)
                               throws IOException

  Returns an input stream for reading the contents of the specified zip file entry.
  Parameters:
    `entry` - the zip file entry
  Returns:
    the input stream for reading the contents of the specified zip file entry.
  Throws:
    `ZipException` - if a ZIP format error has occurred
    `IOException` - if an I/O error has occurred
    `IllegalStateException` - if the zip file has been closed

### getName

    public String getName()

  Returns the path name of the ZIP file.
  Returns:
    the path name of the ZIP file

### entries

    public Enumeration entries()

  Returns an enumeration of the ZIP file entries.
  Returns:
    an enumeration of the ZIP file entries
  Throws:
    `IllegalStateException` - if the zip file has been closed

### size

    public int size()

  Returns the number of entries in the ZIP file.
  Returns:
    the number of entries in the ZIP file
  Throws:
    `IllegalStateException` - if the zip file has been closed

### close

    public void close()
               throws IOException

  Closes the ZIP file.
  Throws:
    `IOException` - if an I/O error has occured

### finalize

    protected void finalize()
                     throws IOException

  Ensures that the `close` method of this ZIP file is called when there are no more references to it.

  Since the time when GC would invoke this method is undetermined, it is strongly recommanded that applications invoke the `close` method as soon they have finished accessing this `ZipFile`. This will prevent holding up system resources for an undetermined length of time.

  Overrides:
    `finalize` in class `Object`
  Throws:
    `IOException` - if an I/O error occurs.
  See Also:
    `close()`

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