unpack200
You use the unpack200
command to transform a packed file into a JAR file for web deployment.
Synopsis
Note:
pack200
and unpack200
have been deprecated and might be removed in a future JDK release.
unpack200 [ options ] input-file JAR-file
-
options
-
The command-line options. See Options for the unpack200 Command.
-
input-file
-
Name of the input file, which can be a
pack200 gzip
file or apack200
file. The input can also be a JAR file produced bypack200
with an effort of0
, in which case the contents of the input file are copied to the output JAR file with thepack200
marker. -
JAR-file
-
Name of the output JAR file.
Description
The unpack200
command is a native implementation that transforms a packed file produced by 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
command settings.
unpack200 myarchive.pack.gz myarchive.jar
Options for the unpack200 Command
-
-Hvalue
or--deflate-hint=value
-
Sets deflation to be
true
,false
, orkeep
on all entries within a JAR file. The default mode iskeep
. If the value istrue
orfalse
, 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.
-
-?
,-h
, or--help
-
Prints help information about the
unpack200
command. -
-V
or--version
-
Prints version information about the
unpack200
command. -
-Joption
-
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.
Notes
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.
Exit Status
The following exit values are returned: 0 for successful completion, and a value that is greater than 0 when an error occurred.