block the socket port to run only a single instance of jar file in windows

Question

I am working on Java Swing application . I have created the jar of my application , when user clicks on the jar application starts. If user clicks multiple times on the jar then multiple instances of the jar run.

SO how can i stop multiple instances of running of Java jar file?

possible duplicate of [How to implement a single instance Java application?](http://stackoverflow.com/questions/177189/how-to-implement-a-single-instance-java-application) — Uwe Plonus, Jul 24 '13 at 11:54

score 0 · Accepted Answer · answered Jul 24 '13 at 09:59

0

Choose a location where to create a lock directory. On startup, try and create it: if it fails, you know another instance is already running.

When the program shuts down, delete the directory.

Note: a directory and not a file, since directory creation is atomic and Java doesn't have O_CREAT|O_EXCL, except for Java 7+.

answered Jul 24 '13 at 09:59

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how can i create the lock directory – adesh singh Jul 24 '13 at 10:01

block the socket port to run only a single instance of jar file in windows

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