Section: JDK Commands (1)
unpack200 - transform a packed file into a JAR file for web deployment
unpack200 [options] input-file
The command-line options.
See Options for the unpack200 Command.
Name of the input file, which can be a pack200 gzip file or a
The input can also be a JAR file produced by pack200 with an
effort of 0, in which case the contents of the input file are
copied to the output JAR file with the pack200 marker.
Name of the output JAR file.
The unpack200 command is a native implementation that
transforms a packed file produced by the pack200 into a JAR
file for web deployment.
An example of typical usage follows.
In the following example, the myarchive.jar file is produced
from myarchive.pack.gz with the default unpack200
unpack200 myarchive.pack.gz myarchive.jar
OPTIONS FOR THE UNPACK200 COMMAND
- -Hvalue or --deflate-hint=value
Sets the deflation to be true, false, or keep
on all entries within a JAR file.
The default mode is keep.
If the value is true or false, then the
--deflate=hint option overrides the default behavior and sets
the deflation mode on all entries within the output JAR file.
- -r or --remove-pack-file
Removes the input pack file.
- -v or --verbose
Displays minimal messages.
Multiple specifications of this option displays more verbose messages.
- -q or --quiet
Specifies quiet operation with no messages.
- -l filename or --log-file=filename
Specifies a log file where output messages are logged.
- -? or -h or --help
Prints help information about the unpack200 command.
- -V or --version
Prints version information about the unpack200 command.
Passes option to the Java Virtual Machine, where
option is one of the options described on the reference page
for the Java application launcher.
For example, -J-Xms48m sets the startup memory to 48 MB.
This command shouldn't be confused with the unpack command.
They're distinctly separate products.
The Java SE API Specification provided with the JDK is the superseding
authority in case of discrepancies.
The following exit values are returned: 0 for successful completion, and
a value that is greater than 0 when an error occurred.