Please help how to run System commands and batch files thru java program

Sir,
I want execute OS commands like dir,cls..etc and batch files,.exe filesthru java program.
I have tried it sofar thru Runtime.getRuntime().exec("execute.bat");
but it is not working.anybody knows about how to run the system commands thru java please give me the code.
thank you,
regards,
j.mouli

I've seen other posts with this questions, and answers. Unfortunately I didn't pay much attention. But the basic idea is to exec command.com and pass the specifc batch or command as an argument.

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