Simple use of JVM's JPS

jps What is it? , What's the use ？

    jps（JVM Process Status Tool）, You can list the virtual machine processes that are running , And show the main class of virtual machine execution （Main Class,main() The class of the function ） The name and the local virtual machine of these processes are unique ID（LVMID,Local Virtual Machine Identifier）.

notes ： be based on windows

-q： Output only VM identifier , barring classname,jar name,arguments in main method 
-m： Output main method Parameters of  
-l： Output the full package name , Apply the main class name ,jar The full pathname of  
-v： Output jvm Parameters  
-V： Output via flag The document is delivered to JVM Parameters in (.hotspotrc File or -XX:Flags= Specified file  
-Joption： Pass parameters to vm, for example :-J-Xms512m

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Get into java bin And then run cmd

Query the full name of the main class

jps -l

Query start main Time parameters

jps -m

Query all processes id

jps -q

Query all processes JVM Parameters

jps -v

Last

    jps Extremely simple , Often used to check java The process of id, Then use other commands to troubleshoot some common problems of the virtual machine , Very practical .

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