Stay organized with collections
Save and categorize content based on your preferences.
JarOutputStream
public
class
JarOutputStream
extends ZipOutputStream
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.
Summary
Inherited constants |
From class
java.util.zip.ZipOutputStream
int |
CENATT
Central directory (CEN) header internal file attributes field offset.
|
int |
CENATX
Central directory (CEN) header external file attributes field offset.
|
int |
CENCOM
Central directory (CEN) header comment length field offset.
|
int |
CENCRC
Central directory (CEN) header uncompressed file crc-32 value field offset.
|
int |
CENDSK
Central directory (CEN) header disk number start field offset.
|
int |
CENEXT
Central directory (CEN) header extra field length field offset.
|
int |
CENFLG
Central directory (CEN) header encrypt, decrypt flags field offset.
|
int |
CENHDR
Central directory (CEN) header size in bytes (including signature).
|
int |
CENHOW
Central directory (CEN) header compression method field offset.
|
int |
CENLEN
Central directory (CEN) header uncompressed size field offset.
|
int |
CENNAM
Central directory (CEN) header filename length field offset.
|
int |
CENOFF
Central directory (CEN) header LOC header offset field offset.
|
long |
CENSIG
Central directory (CEN) header signature.
|
int |
CENSIZ
Central directory (CEN) header compressed size field offset.
|
int |
CENTIM
Central directory (CEN) header modification time field offset.
|
int |
CENVEM
Central directory (CEN) header version made by field offset.
|
int |
CENVER
Central directory (CEN) header version needed to extract field offset.
|
int |
DEFLATED
Compression method for compressed (DEFLATED) entries.
|
int |
ENDCOM
End of central directory (END) header zip file comment length field offset.
|
int |
ENDHDR
End of central directory (END) header size in bytes (including signature).
|
int |
ENDOFF
End of central directory (END) header offset for the first CEN header field offset.
|
long |
ENDSIG
End of central directory (END) header signature.
|
int |
ENDSIZ
End of central directory (END) header central directory size in bytes field offset.
|
int |
ENDSUB
End of central directory (END) header number of entries on this disk field offset.
|
int |
ENDTOT
End of central directory (END) header total number of entries field offset.
|
int |
EXTCRC
Extra local (EXT) header uncompressed file crc-32 value field offset.
|
int |
EXTHDR
Extra local (EXT) header size in bytes (including signature).
|
int |
EXTLEN
Extra local (EXT) header uncompressed size field offset.
|
long |
EXTSIG
Extra local (EXT) header signature.
|
int |
EXTSIZ
Extra local (EXT) header compressed size field offset.
|
int |
LOCCRC
Local file (LOC) header uncompressed file crc-32 value field offset.
|
int |
LOCEXT
Local file (LOC) header extra field length field offset.
|
int |
LOCFLG
Local file (LOC) header general purpose bit flag field offset.
|
int |
LOCHDR
Local file (LOC) header size in bytes (including signature).
|
int |
LOCHOW
Local file (LOC) header compression method field offset.
|
int |
LOCLEN
Local file (LOC) header uncompressed size field offset.
|
int |
LOCNAM
Local file (LOC) header filename length field offset.
|
long |
LOCSIG
Local file (LOC) header signature.
|
int |
LOCSIZ
Local file (LOC) header compressed size field offset.
|
int |
LOCTIM
Local file (LOC) header modification time field offset.
|
int |
LOCVER
Local file (LOC) header version needed to extract field offset.
|
int |
STORED
Compression method for uncompressed (STORED) entries.
|
|
Public methods |
void
|
putNextEntry(ZipEntry ze)
Begins writing a new JAR file entry and positions the stream
to the start of the entry data.
|
Inherited methods |
From class
java.util.zip.ZipOutputStream
void
|
close()
Closes the ZIP output stream as well as the stream being filtered.
|
void
|
closeEntry()
Closes the current ZIP entry and positions the stream for writing
the next entry.
|
void
|
finish()
Finishes writing the contents of the ZIP output stream without closing
the underlying stream.
|
void
|
putNextEntry(ZipEntry e)
Begins writing a new ZIP file entry and positions the stream to the
start of the entry data.
|
void
|
setComment(String comment)
Sets the ZIP file comment.
|
void
|
setLevel(int level)
Sets the compression level for subsequent entries which are DEFLATED.
|
void
|
setMethod(int method)
Sets the default compression method for subsequent entries.
|
void
|
write(byte[] b, int off, int len)
Writes an array of bytes to the current ZIP entry data.
|
|
From class
java.util.zip.DeflaterOutputStream
void
|
close()
Writes remaining compressed data to the output stream and closes the
underlying stream.
|
void
|
deflate()
Writes next block of compressed data to the output stream.
|
void
|
finish()
Finishes writing compressed data to the output stream without closing
the underlying stream.
|
void
|
flush()
Flushes the compressed output stream.
|
void
|
write(byte[] b, int off, int len)
Writes an array of bytes to the compressed output stream.
|
void
|
write(int b)
Writes a byte to the compressed output stream.
|
|
From class
java.io.FilterOutputStream
void
|
close()
Closes this output stream and releases any system resources
associated with the stream.
|
void
|
flush()
Flushes this output stream and forces any buffered output bytes
to be written out to the stream.
|
void
|
write(byte[] b)
Writes b.length bytes to this output stream.
|
void
|
write(byte[] b, int off, int len)
Writes len bytes from the specified
byte array starting at offset off to
this output stream.
|
void
|
write(int b)
Writes the specified byte to this output stream.
|
|
From class
java.io.OutputStream
void
|
close()
Closes this output stream and releases any system resources
associated with this stream.
|
void
|
flush()
Flushes this output stream and forces any buffered output bytes
to be written out.
|
static
OutputStream
|
nullOutputStream()
Returns a new OutputStream which discards all bytes.
|
void
|
write(byte[] b)
Writes b.length bytes from the specified byte array
to this output stream.
|
void
|
write(byte[] b, int off, int len)
Writes len bytes from the specified byte array
starting at offset off to this output stream.
|
abstract
void
|
write(int b)
Writes the specified byte to this output stream.
|
|
From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
void
|
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
final
Class<?>
|
getClass()
Returns the runtime class of this Object.
|
int
|
hashCode()
Returns a hash code value for the object.
|
final
void
|
notify()
Wakes up a single thread that is waiting on this object's
monitor.
|
final
void
|
notifyAll()
Wakes up all threads that are waiting on this object's monitor.
|
String
|
toString()
Returns a string representation of the object.
|
final
void
|
wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
|
|
From interface
java.io.Closeable
abstract
void
|
close()
Closes this stream and releases any system resources associated
with it.
|
|
From interface
java.io.Flushable
abstract
void
|
flush()
Flushes this stream by writing any buffered output to the underlying
stream.
|
|
|
|
Public constructors
JarOutputStream
public JarOutputStream (OutputStream out)
Creates a new JarOutputStream with no manifest.
| Parameters |
out |
OutputStream: the actual output stream |
JarOutputStream
public JarOutputStream (OutputStream out,
Manifest man)
Creates a new JarOutputStream with the specified
Manifest. The manifest is written as the first
entry to the output stream.
| Parameters |
out |
OutputStream: the actual output stream |
man |
Manifest: the optional Manifest |
Public methods
putNextEntry
public void putNextEntry (ZipEntry ze)
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.
The current time will be used if the entry has no set modification
time.
| Parameters |
ze |
ZipEntry: the ZIP/JAR entry to be written |
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
Last updated 2026-06-23 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-06-23 UTC."],[],[]]