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## java.util.zip
Class ZipFile

    java.lang.Object
      java.util.zip.ZipFile

Direct Known Subclasses:
  JarFile

    public class ZipFile

extends Object

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

Unless otherwise noted, passing a `null` argument to a constructor or method in this class will cause a `NullPointerException` to be thrown.

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<? extends ZipEntry>` | `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.

  See Also:
    Constant Field Values

### 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.

  See Also:
    Constant Field Values

### LOCSIG

    public static final long LOCSIG

See Also:
  Constant Field Values

### EXTSIG

    public static final long EXTSIG

See Also:
  Constant Field Values

### CENSIG

    public static final long CENSIG

See Also:
  Constant Field Values

### ENDSIG

    public static final long ENDSIG

See Also:
  Constant Field Values

### LOCHDR

    public static final int LOCHDR

See Also:
  Constant Field Values

### EXTHDR

    public static final int EXTHDR

See Also:
  Constant Field Values

### CENHDR

    public static final int CENHDR

See Also:
  Constant Field Values

### ENDHDR

    public static final int ENDHDR

See Also:
  Constant Field Values

### LOCVER

    public static final int LOCVER

See Also:
  Constant Field Values

### LOCFLG

    public static final int LOCFLG

See Also:
  Constant Field Values

### LOCHOW

    public static final int LOCHOW

See Also:
  Constant Field Values

### LOCTIM

    public static final int LOCTIM

See Also:
  Constant Field Values

### LOCCRC

    public static final int LOCCRC

See Also:
  Constant Field Values

### LOCSIZ

    public static final int LOCSIZ

See Also:
  Constant Field Values

### LOCLEN

    public static final int LOCLEN

See Also:
  Constant Field Values

### LOCNAM

    public static final int LOCNAM

See Also:
  Constant Field Values

### LOCEXT

    public static final int LOCEXT

See Also:
  Constant Field Values

### EXTCRC

    public static final int EXTCRC

See Also:
  Constant Field Values

### EXTSIZ

    public static final int EXTSIZ

See Also:
  Constant Field Values

### EXTLEN

    public static final int EXTLEN

See Also:
  Constant Field Values

### CENVEM

    public static final int CENVEM

See Also:
  Constant Field Values

### CENVER

    public static final int CENVER

See Also:
  Constant Field Values

### CENFLG

    public static final int CENFLG

See Also:
  Constant Field Values

### CENHOW

    public static final int CENHOW

See Also:
  Constant Field Values

### CENTIM

    public static final int CENTIM

See Also:
  Constant Field Values

### CENCRC

    public static final int CENCRC

See Also:
  Constant Field Values

### CENSIZ

    public static final int CENSIZ

See Also:
  Constant Field Values

### CENLEN

    public static final int CENLEN

See Also:
  Constant Field Values

### CENNAM

    public static final int CENNAM

See Also:
  Constant Field Values

### CENEXT

    public static final int CENEXT

See Also:
  Constant Field Values

### CENCOM

    public static final int CENCOM

See Also:
  Constant Field Values

### CENDSK

    public static final int CENDSK

See Also:
  Constant Field Values

### CENATT

    public static final int CENATT

See Also:
  Constant Field Values

### CENATX

    public static final int CENATX

See Also:
  Constant Field Values

### CENOFF

    public static final int CENOFF

See Also:
  Constant Field Values

### ENDSUB

    public static final int ENDSUB

See Also:
  Constant Field Values

### ENDTOT

    public static final int ENDTOT

See Also:
  Constant Field Values

### ENDSIZ

    public static final int ENDSIZ

See Also:
  Constant Field Values

### ENDOFF

    public static final int ENDOFF

See Also:
  Constant Field Values

### ENDCOM

    public static final int ENDCOM

See Also:
  Constant Field Values

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, or its `checkDelete` method doesn't allow deleting the file when the `OPEN_DELETE` flag is set.
    `IllegalArgumentException` - if the `mode` argument is invalid
  Since:
    1.3
  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.

  Closing this ZIP file will, in turn, close all input streams that have been returned by invocations of this method.

  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<? extends ZipEntry> 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.

  Closing this ZIP file will close all of the input streams previously returned by invocations of the `getInputStream` method.

  Throws:
    `IOException` - if an I/O error has occurred

### 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 recommended 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 has occurred
  See Also:
    `close()`

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