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java.lang.Object
- java.util.zip.ZipFile
- - java.util.jar.JarFile

All Implemented Interfaces:

Closeable, AutoCloseable
```
public class JarFile
extends ZipFile
```
The JarFile class is used to read the contents of a jar file from any file that can be opened with java.io.RandomAccessFile. It extends the class java.util.zip.ZipFile with support for reading an optional Manifest entry. The Manifest can be used to specify meta-information about the jar file and its entries.
Unless otherwise noted, passing a null argument to a constructor or method in this class will cause a NullPointerException to be thrown.

Since:

1.2

See Also:
Manifest, ZipFile, JarEntry

Field Summary

Fields
Modifier and Type	Field and Description
`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 String`	`MANIFEST_NAME` The JAR manifest file name.

JarFile (Java Platform SE 7 ) Home of API Java Contents Haut

Fields inherited from class java.util.zip.ZipFile OPEN_DELETE, OPEN_READ

Constructor Summary

Constructors
Constructor and Description
`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.
`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 (Java Platform SE 7 ) Home of API Java Contents Haut

Method Summary

Methods
Modifier and Type	Method and Description
`Enumeration<JarEntry>`	`entries()` Returns an enumeration of the zip file entries.
`ZipEntry`	`getEntry(String name)` Returns the `ZipEntry` for the given entry name or `null` if not found.
`InputStream`	`getInputStream(ZipEntry ze)` Returns an input stream for reading the contents of the specified zip file entry.
`JarEntry`	`getJarEntry(String name)` Returns the `JarEntry` for the given entry name or `null` if not found.
`Manifest`	`getManifest()` Returns the jar file manifest, or `null` if none.

JarFile (Java Platform SE 7 ) Home of API Java Contents Haut

Methods inherited from class java.util.zip.ZipFile close, finalize, getComment, getName, size

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

- Field Detail
  - MANIFEST_NAME
    public static final String MANIFEST_NAME
    
    The JAR manifest file name.
    
    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
  - JarFile
    public JarFile(String name) throws IOException
    
    Creates a new JarFile to read from the specified file name. The JarFile will be verified if it is signed.
    
    Parameters:
    name - the name of the jar file to be opened for reading
    
    Throws:
    
    IOException - if an I/O error has occurred
    
    SecurityException - if access to the file is denied by the SecurityManager
  - JarFile
    public JarFile(String name, boolean verify) throws IOException
    
    Creates a new JarFile to read from the specified file name.
    
    Parameters:
    name - the name of the jar file to be opened for reading
    verify - whether or not to verify the jar file if it is signed.
    
    Throws:
    
    IOException - if an I/O error has occurred
    
    SecurityException - if access to the file is denied by the SecurityManager
  - JarFile
    public JarFile(File file) throws IOException
    
    Creates a new JarFile to read from the specified File object. The JarFile will be verified if it is signed.
    
    Parameters:
    file - the jar file to be opened for reading
    
    Throws:
    
    IOException - if an I/O error has occurred
    
    SecurityException - if access to the file is denied by the SecurityManager
  - JarFile
    public JarFile(File file, boolean verify) throws IOException
    
    Creates a new JarFile to read from the specified File object.
    
    Parameters:
    file - the jar file to be opened for reading
    verify - whether or not to verify the jar file if it is signed.
    
    Throws:
    
    IOException - if an I/O error has occurred
    
    SecurityException - if access to the file is denied by the SecurityManager.
  - JarFile
    public JarFile(File file, boolean verify, int mode) throws IOException
    
    Creates a new JarFile to read from the specified File object in the specified mode. The mode argument must be either OPEN_READ or OPEN_READ | OPEN_DELETE.
    
    Parameters:
    file - the jar file to be opened for reading
    verify - whether or not to verify the jar file if it is signed.
    mode - the mode in which the file is to be opened
    
    Throws:
    
    IOException - if an I/O error has occurred
    
    IllegalArgumentException - if the mode argument is invalid
    
    SecurityException - if access to the file is denied by the SecurityManager
    Since:
    
    1.3
- Method Detail
  - getManifest
    public Manifest getManifest() throws IOException
    
    Returns the jar file manifest, or null if none.
    
    Returns:
    the jar file manifest, or null if none
    
    Throws:
    
    IllegalStateException - may be thrown if the jar file has been closed
    
    IOException
  - getJarEntry
    public JarEntry getJarEntry(String name)
    
    Returns the JarEntry for the given entry name or null if not found.
    
    Parameters:
    name - the jar file entry name
    
    Returns:
    the JarEntry for the given entry name or null if not found.
    
    Throws:
    
    IllegalStateException - may be thrown if the jar file has been closed
    See Also:
    JarEntry
  - getEntry
    public ZipEntry getEntry(String name)
    
    Returns the ZipEntry for the given entry name or null if not found.
    
    Overrides:
    
    getEntry in class ZipFile
    
    Parameters:
    name - the jar file entry name
    
    Returns:
    the ZipEntry for the given entry name or null if not found
    
    Throws:
    
    IllegalStateException - may be thrown if the jar file has been closed
    See Also:
    ZipEntry
  - entries
    public Enumeration<JarEntry> entries()
    
    Returns an enumeration of the zip file entries.
    
    Overrides:
    
    entries in class ZipFile
    
    Returns:
    an enumeration of the ZIP file entries
  - getInputStream
    public InputStream getInputStream(ZipEntry ze) throws IOException
    
    Returns an input stream for reading the contents of the specified zip file entry.
    
    Overrides:
    
    getInputStream in class ZipFile
    
    Parameters:
    ze - the zip file entry
    
    Returns:
    an input stream for reading the contents of the specified zip file entry
    
    Throws:
    
    ZipException - if a zip file format error has occurred
    
    IOException - if an I/O error has occurred
    
    SecurityException - if any of the jar file entries are incorrectly signed.
    
    IllegalStateException - may be thrown if the jar file has been closed

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Class JarFile

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