Java 虚拟机工具 jps

官方网站：https://docs.oracle.com/javase/7/docs/technotes/tools/share/jps.html

The jps command supports a number of options that modify the output of the command. These options are subject to change or removal in the future.

• -q，Suppress the output of the class name, JAR file name, and arguments passed to the main method, producing only a list of local VM identifiers.

• -m，Output the arguments passed to the main method. The output may be null for embedded JVMs.

• -l，Output the full package name for the application's main class or the full path name to the application's JAR file.

• -v，Output the arguments passed to the JVM.

• -V，Output the arguments passed to the JVM through the flags file (the .hotspotrc file or the file specified by the -XX:Flags=<filename> argument).
• -Joption，Pass option to the java launcher called by jps.

For example, -J-Xms48m sets the startup memory to 48 megabytes.

It is a common convention for -J to pass options to the underlying VM executing applications written in Java.

jps -q

jps -m 

jps -l

jps -v

jps -V

jps -J-参数，用来动态设置 jvm 参数