Java控制檯參數詳解

Java控制檯中的-X系列參數：

Non-standard, or -X, command line options are options that are exclusive to Oracle JRockit JVM that change the behavior of JRockit JVM to better suit the needs of different Java applications. These options are all preceded by -X and will not work on other JVMs (conversely, the non-standard options used by other JVMs won't work with JRockit JVM).

非標準化的 或者 -X 命令行參數是Oracle JRockit JVM獨有的。這些參數都以-X開頭，而且只在JRockit JVM中有效。

Note: Since these options are non-standard, they are subject to change at any time.

注意：既然這些參數都是非錶轉化的，那麼就有可能隨時發生更改！

在Java命令行中，執行

java -X

能夠查看全部的-X參數

C:\Users\Admin>java -X
    -Xmixed           mixed mode execution (default)
    -Xint             interpreted mode execution only
    -Xbootclasspath:<directories and zip/jar files separated by ;>
                      set search path for bootstrap classes and resources
    -Xbootclasspath/a:<directories and zip/jar files separated by ;>
                      append to end of bootstrap class path
    -Xbootclasspath/p:<directories and zip/jar files separated by ;>
                      prepend in front of bootstrap class path
    -Xdiag            show additional diagnostic messages
    -Xnoclassgc       disable class garbage collection
    -Xincgc           enable incremental garbage collection
    -Xloggc:<file>    log GC status to a file with time stamps
    -Xbatch           disable background compilation
    -Xms<size>        set initial Java heap size
    -Xmx<size>        set maximum Java heap size
    -Xss<size>        set java thread stack size
    -Xprof            output cpu profiling data
    -Xfuture          enable strictest checks, anticipating future default
    -Xrs              reduce use of OS signals by Java/VM (see documentation)
    -Xcheck:jni       perform additional checks for JNI functions
    -Xshare:off       do not attempt to use shared class data
    -Xshare:auto      use shared class data if possible (default)
    -Xshare:on        require using shared class data, otherwise fail.
    -XshowSettings    show all settings and continue
    -XshowSettings:all
                      show all settings and continue
    -XshowSettings:vm show all vm related settings and continue
    -XshowSettings:properties
                      show all property settings and continue
    -XshowSettings:locale
                      show all locale related settings and continue

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

參考地址（英文）：

http://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/refman/optionX.html

PDF版本的參考手冊下載（英文版）：

http://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/pdf/refman.pdf