How do you get a process id in java?

I am trying to find a way to programmaticaly open and close an application. I can launch the application easily using

 Runtime.getRuntime().exec(new String[] {"open", "<path to application>"});

however, the only way I can find to close it is to use the line

 Runtime.getRuntime().exec(new String[] {"kill", "<process id#>"});

and I can't find anyway to get the id # other than manually opening terminal and using top to find the #. If there is a programmatic way to get this id, or just a better way to go about opening and cl开发者_Go百科osing applications i would love to hear about it.

Thanks

Use a java.lang.ProcessBuilder to start the subprocess. The returned Process object has a destroy() method which will let you kill it.

This probably isn't relevant anymore to the original poster (due to the elapsed time) but just for the sake of completeness...

You get a handle to the process object as a result of the exec(...) command:

Process myProcess = Runtime.getRuntime().exec("mybin");

You can then kill at any later time with destroy():

myProcess.destroy();

Note: This might be similar to what Jim was describing but not using the ProcessBuilder.