1     -Xmixed           mixed mode execution (default)

     2     -Xint             interpreted mode execution only

     3     -Xbootclasspath:<directories and zip/jar files separated by ;>

     4                       set search path for bootstrap classes and resources

     5     -Xbootclasspath/a:<directories and zip/jar files separated by ;>

     6                       append to end of bootstrap class path

     7     -Xbootclasspath/p:<directories and zip/jar files separated by ;>

     8                       prepend in front of bootstrap class path

     9     -Xnoclassgc       disable class garbage collection

    10     -Xincgc           enable incremental garbage collection

    11     -Xloggc:<file>    log GC status to a file with time stamps

    12     -Xbatch           disable background compilation

    13     -Xms<size>        set initial Java heap size

    14     -Xmx<size>        set maximum Java heap size

    15     -Xss<size>        set java thread stack size

    16     -Xprof            output cpu profiling data

    17     -Xfuture          enable strictest checks, anticipating future default

    18     -Xrs              reduce use of OS signals by Java/VM (see documentation)

    19     -Xcheck:jni       perform additional checks for JNI functions

    20     -Xshare:off	      do not attempt to use shared class data

    21     -Xshare:auto      use shared class data if possible (default)

    22     -Xshare:on	      require using shared class data, otherwise fail.

    23 

    24 The -X options are non-standard and subject to change without notice.