Reading Java system properties from command line

Question

Is there a better way to print system properties from command line? As we can set the property e.g.

 java  -D=  //set a system property         


        

Answer 1

You can use jps a tool that comes with the jdk. It can print out the system properties that were passed to a java process.

For example: On my system eclipse is running and

$ jps -v

outputs

6632  -Dosgi.requiredJavaVersion=1.6 -Xms1024m -Xmx2048m -XX:MaxPermSize=512m

jps is located in JDK_HOME/bin

EDIT

If you want all the properties use the jinfo tool that is also located in JDK_HOME/bin. To use it you must know the process id of the java process you want to get information from. E.g.

$ jinfo 6632

This tool also prints out the java.ext.dirs