How do i terminate a process tree from Java?

Question

i am using Runtime.getRuntime().exec() command in Java to start a batch file which in turn starts another process for windows platform.

javaw.exe(Process1)
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Answer 1

An alternative solution, if you control the child process as well as the batch file, would be to have the child process create a thread, open a ServerSocket, listen for a connection to it, and call System.exit() if it receives a correct password on it.

There may be complications if you need multiple simultaneous instances; at that point you would need some way of allocating port numbers to them.