{
    "mode": "man",
    "parameter": "unpack200",
    "section": "1",
    "url": "https://www.chedong.com/phpMan.php/man/unpack200/1/json",
    "generated": "2026-05-30T05:15:19Z",
    "synopsis": "unpack200 [ options ] input-file JAR-file\noptions\nThe command-line options. See Options.\ninput-file\nName of the input file, which can be a pack200 gzip file or a pack200 file. The input\ncan also be JAR file produced by pack200(1) with an effort of 0, in which case the\ncontents of the input file are copied to the output JAR file with the Pack200 marker.\nJAR-file\nName of the output JAR file.",
    "sections": {
        "NAME": {
            "content": "unpack200 - Transforms a packed file produced by pack200(1) into a JAR file for web\ndeployment.\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "unpack200 [ options ] input-file JAR-file\n\n\noptions\nThe command-line options. See Options.\n\ninput-file\nName of the input file, which can be a pack200 gzip file or a pack200 file. The input\ncan also be JAR file produced by pack200(1) with an effort of 0, in which case the\ncontents of the input file are copied to the output JAR file with the Pack200 marker.\n\nJAR-file\nName of the output JAR file.\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "The unpack200 command is a native implementation that transforms a packed file produced by\npack200(1) into a JAR file. A typical usage follows. In the following example, the\nmyarchive.jar file is produced from myarchive.pack.gz with the default unpack200 command\nsettings.\n",
            "subsections": [
                {
                    "name": "unpack200 myarchive.pack.gz myarchive.jar",
                    "content": ""
                }
            ]
        },
        "OPTIONS": {
            "content": "-Hvalue --deflate-hint=value\nSets the deflation to be true, false, or keep on all entries within a JAR file. The\ndefault mode is keep. If the value is true or false, then the --deflate=hint option\noverrides the default behavior and sets the deflation mode on all entries within the\noutput JAR file.\n\n-r --remove-pack-file\nRemoves the input pack file.\n\n-v --verbose\nDisplays minimal messages. Multiple specifications of this option displays more\nverbose messages.\n\n-q --quiet\nSpecifies quiet operation with no messages.\n\n-lfilename --log-file=filename\nSpecifies a log file where output messages are logged.\n\n-? -h --help\nPrints help information about the unpack200 command.\n\n-V --version\nPrints version information about the unpack200 command.\n",
            "subsections": [
                {
                    "name": "-J_option_",
                    "content": "Passes option to the Java Virtual Machine, where option is one of the options\ndescribed on the reference page for the Java application launcher. For example, -J-\nXms48m sets the startup memory to 48 MB. See java(1).\n"
                }
            ]
        },
        "NOTES": {
            "content": "This command should not be confused with the unpack command. They are distinctly separate\nproducts.\n\nThe Java SE API Specification provided with the JDK is the superseding authority in case of\ndiscrepancies.\n",
            "subsections": []
        },
        "EXIT STATUS": {
            "content": "The following exit values are returned: 0 for successful completion, and a value that is\ngreater than 0 when an error occurred.\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "• pack200(1)\n\n• jar(1)\n\n• jarsigner(1)\n\n• Pack200 and Compression at\nhttp://docs.oracle.com/javase/8/docs/technotes/guides/deployment/deployment-\nguide/pack200.html\n\n• The Java SE Technical Documentation page at http://docs.oracle.com/javase/\n\n\n\nJDK 8                                     21 November 2013                              unpack200(1)",
            "subsections": []
        }
    },
    "summary": "unpack200 - Transforms a packed file produced by pack200(1) into a JAR file for web deployment.",
    "flags": [
        {
            "flag": "",
            "long": null,
            "arg": null,
            "description": "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. See java(1)."
        }
    ],
    "examples": [],
    "see_also": [
        {
            "name": "pack200",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/pack200/1/json"
        },
        {
            "name": "jar",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/jar/1/json"
        },
        {
            "name": "jarsigner",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/jarsigner/1/json"
        }
    ]
}