JarOutputStream (Java SE 21 & JDK 21)

All Implemented Interfaces:: Closeable, Flushable, AutoCloseable

The JarOutputStream class is used to write the contents of a JAR file to any output stream. It extends the class java.util.zip.ZipOutputStream with support for writing an optional Manifest entry. The Manifest can be used to specify meta-information about the JAR file and its entries.

Since:

1.2

See Also:

Field Summary

Fields

static final int

Central directory (CEN) header internal file attributes field offset.

static final int

Central directory (CEN) header external file attributes field offset.

static final int

Central directory (CEN) header comment length field offset.

static final int

Central directory (CEN) header uncompressed file crc-32 value field offset.

static final int

Central directory (CEN) header disk number start field offset.

static final int

Central directory (CEN) header extra field length field offset.

static final int

Central directory (CEN) header encrypt, decrypt flags field offset.

static final int

Central directory (CEN) header size in bytes (including signature).

static final int

Central directory (CEN) header compression method field offset.

static final int

Central directory (CEN) header uncompressed size field offset.

static final int

Central directory (CEN) header filename length field offset.

static final int

Central directory (CEN) header LOC header offset field offset.

static final long

Central directory (CEN) header signature.

static final int

Central directory (CEN) header compressed size field offset.

static final int

Central directory (CEN) header modification time field offset.

static final int

Central directory (CEN) header version made by field offset.

static final int

Central directory (CEN) header version needed to extract field offset.

static final int

End of central directory (END) header zip file comment length field offset.

static final int

End of central directory (END) header size in bytes (including signature).

static final int

End of central directory (END) header offset for the first CEN header field offset.

static final long

End of central directory (END) header signature.

static final int

End of central directory (END) header central directory size in bytes field offset.

static final int

End of central directory (END) header number of entries on this disk field offset.

static final int

End of central directory (END) header total number of entries field offset.

static final int

Extra local (EXT) header uncompressed file crc-32 value field offset.

static final int

Extra local (EXT) header size in bytes (including signature).

static final int

Extra local (EXT) header uncompressed size field offset.

static final long

Extra local (EXT) header signature.

static final int

Extra local (EXT) header compressed size field offset.

static final int

Local file (LOC) header uncompressed file crc-32 value field offset.

static final int

Local file (LOC) header extra field length field offset.

static final int

Local file (LOC) header general purpose bit flag field offset.

static final int

Local file (LOC) header size in bytes (including signature).

static final int

Local file (LOC) header compression method field offset.

static final int

Local file (LOC) header uncompressed size field offset.

static final int

Local file (LOC) header filename length field offset.

static final long

Local file (LOC) header signature.

static final int

Local file (LOC) header compressed size field offset.

static final int

Local file (LOC) header modification time field offset.

static final int

Local file (LOC) header version needed to extract field offset.
Constructor Summary

Constructors

Creates a new JarOutputStream with no manifest.

Creates a new JarOutputStream with the specified Manifest.
Method Summary

void

Begins writing a new JAR file entry and positions the stream to the start of the entry data.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- LOCSIG
  
  static final long LOCSIG
  
  Local file (LOC) header signature.
  See Also:
  
  Constant Field Values
- EXTSIG
  
  static final long EXTSIG
  
  Extra local (EXT) header signature.
  See Also:
  
  Constant Field Values
- CENSIG
  
  static final long CENSIG
  
  Central directory (CEN) header signature.
  See Also:
  
  Constant Field Values
- ENDSIG
  
  static final long ENDSIG
  
  End of central directory (END) header signature.
  See Also:
  
  Constant Field Values
- LOCHDR
  
  static final int LOCHDR
  
  Local file (LOC) header size in bytes (including signature).
  See Also:
  
  Constant Field Values
- EXTHDR
  
  static final int EXTHDR
  
  Extra local (EXT) header size in bytes (including signature).
  See Also:
  
  Constant Field Values
- CENHDR
  
  static final int CENHDR
  
  Central directory (CEN) header size in bytes (including signature).
  See Also:
  
  Constant Field Values
- ENDHDR
  
  static final int ENDHDR
  
  End of central directory (END) header size in bytes (including signature).
  See Also:
  
  Constant Field Values
- LOCVER
  
  static final int LOCVER
  
  Local file (LOC) header version needed to extract field offset.
  See Also:
  
  Constant Field Values
- LOCFLG
  
  static final int LOCFLG
  
  Local file (LOC) header general purpose bit flag field offset.
  See Also:
  
  Constant Field Values
- LOCHOW
  
  static final int LOCHOW
  
  Local file (LOC) header compression method field offset.
  See Also:
  
  Constant Field Values
- LOCTIM
  
  static final int LOCTIM
  
  Local file (LOC) header modification time field offset.
  See Also:
  
  Constant Field Values
- LOCCRC
  
  static final int LOCCRC
  
  Local file (LOC) header uncompressed file crc-32 value field offset.
  See Also:
  
  Constant Field Values
- LOCSIZ
  
  static final int LOCSIZ
  
  Local file (LOC) header compressed size field offset.
  See Also:
  
  Constant Field Values
- LOCLEN
  
  static final int LOCLEN
  
  Local file (LOC) header uncompressed size field offset.
  See Also:
  
  Constant Field Values
- LOCNAM
  
  static final int LOCNAM
  
  Local file (LOC) header filename length field offset.
  See Also:
  
  Constant Field Values
- LOCEXT
  
  static final int LOCEXT
  
  Local file (LOC) header extra field length field offset.
  See Also:
  
  Constant Field Values
- EXTCRC
  
  static final int EXTCRC
  
  Extra local (EXT) header uncompressed file crc-32 value field offset.
  See Also:
  
  Constant Field Values
- EXTSIZ
  
  static final int EXTSIZ
  
  Extra local (EXT) header compressed size field offset.
  See Also:
  
  Constant Field Values
- EXTLEN
  
  static final int EXTLEN
  
  Extra local (EXT) header uncompressed size field offset.
  See Also:
  
  Constant Field Values
- CENVEM
  
  static final int CENVEM
  
  Central directory (CEN) header version made by field offset.
  See Also:
  
  Constant Field Values
- CENVER
  
  static final int CENVER
  
  Central directory (CEN) header version needed to extract field offset.
  See Also:
  
  Constant Field Values
- CENFLG
  
  static final int CENFLG
  
  Central directory (CEN) header encrypt, decrypt flags field offset.
  See Also:
  
  Constant Field Values
- CENHOW
  
  static final int CENHOW
  
  Central directory (CEN) header compression method field offset.
  See Also:
  
  Constant Field Values
- CENTIM
  
  static final int CENTIM
  
  Central directory (CEN) header modification time field offset.
  See Also:
  
  Constant Field Values
- CENCRC
  
  static final int CENCRC
  
  Central directory (CEN) header uncompressed file crc-32 value field offset.
  See Also:
  
  Constant Field Values
- CENSIZ
  
  static final int CENSIZ
  
  Central directory (CEN) header compressed size field offset.
  See Also:
  
  Constant Field Values
- CENLEN
  
  static final int CENLEN
  
  Central directory (CEN) header uncompressed size field offset.
  See Also:
  
  Constant Field Values
- CENNAM
  
  static final int CENNAM
  
  Central directory (CEN) header filename length field offset.
  See Also:
  
  Constant Field Values
- CENEXT
  
  static final int CENEXT
  
  Central directory (CEN) header extra field length field offset.
  See Also:
  
  Constant Field Values
- CENCOM
  
  static final int CENCOM
  
  Central directory (CEN) header comment length field offset.
  See Also:
  
  Constant Field Values
- CENDSK
  
  static final int CENDSK
  
  Central directory (CEN) header disk number start field offset.
  See Also:
  
  Constant Field Values
- CENATT
  
  static final int CENATT
  
  Central directory (CEN) header internal file attributes field offset.
  See Also:
  
  Constant Field Values
- CENATX
  
  static final int CENATX
  
  Central directory (CEN) header external file attributes field offset.
  See Also:
  
  Constant Field Values
- CENOFF
  
  static final int CENOFF
  
  Central directory (CEN) header LOC header offset field offset.
  See Also:
  
  Constant Field Values
- ENDSUB
  
  static final int ENDSUB
  
  End of central directory (END) header number of entries on this disk field offset.
  See Also:
  
  Constant Field Values
- ENDTOT
  
  static final int ENDTOT
  
  End of central directory (END) header total number of entries field offset.
  See Also:
  
  Constant Field Values
- ENDSIZ
  
  static final int ENDSIZ
  
  End of central directory (END) header central directory size in bytes field offset.
  See Also:
  
  Constant Field Values
- ENDOFF
  
  static final int ENDOFF
  
  End of central directory (END) header offset for the first CEN header field offset.
  See Also:
  
  Constant Field Values
- ENDCOM
  
  static final int ENDCOM
  
  End of central directory (END) header zip file comment length field offset.
  See Also:
  
  Constant Field Values
Constructor Details
- JarOutputStream
  
  Creates a new JarOutputStream with the specified Manifest. The manifest is written as the first entry to the output stream.
  
  Parameters:
  
  out - the actual output stream
  
  man - the optional Manifest
  
  Throws:
  
  IOException - if an I/O error has occurred
- JarOutputStream
  
  Creates a new JarOutputStream with no manifest.
  
  Parameters:
  
  out - the actual output stream
  
  Throws:
  
  IOException - if an I/O error has occurred
Method Details
- putNextEntry
  
  Begins writing a new JAR file entry and positions the stream to the start of the entry data. This method will also close any previous entry.
  The default compression method will be used if no compression method was specified for the entry. When writing a compressed (DEFLATED) entry, and the compressed size has not been explicitly set with the ZipEntry.setCompressedSize(long) method, then the compressed size will be set to the actual compressed size after deflation.
  The current time will be used if the entry has no set modification time.
  
  Overrides:
  
  putNextEntry in class ZipOutputStream
  
  Parameters:
  
  ze - the ZIP/JAR entry to be written
  
  Throws:
  
  ZipException - if a ZIP error has occurred
  
  IOException - if an I/O error has occurred

Field Summary

Constructor Summary

Method Summary

Methods declared in class java.lang.Object

Field Details

LOCSIG

EXTSIG

CENSIG

ENDSIG

LOCHDR

EXTHDR

CENHDR

ENDHDR

LOCVER

LOCFLG

LOCHOW

LOCTIM

LOCCRC

LOCSIZ

LOCLEN

LOCNAM

LOCEXT

EXTCRC

EXTSIZ

EXTLEN

CENVEM

CENVER

CENFLG

CENHOW

CENTIM

CENCRC

CENSIZ

CENLEN

CENNAM

CENEXT

CENCOM

CENDSK

CENATT

CENATX

CENOFF

ENDSUB

ENDTOT

ENDSIZ

ENDOFF

ENDCOM

Constructor Details

JarOutputStream

JarOutputStream

Method Details

putNextEntry