How to kill a .exe file from java !!

Question

hi !!
how can i avoid duplicate use of a .exe file in jva ! i mean how can i kill duplicated copies sothat i wan allow only one copy ( one use ) at once !!
please help me

Answer 1

A network port can only be used by one process at a time.
So you can use this as a marker or lock to tell if your program
is already running.
It's a hack, and won't work if anyone else choses the same
port you do, or if your program doesn't release the socket
cleanly when it exits.
amarshwren
import java.io.IOException;
import java.net.ServerSocket;
public class SocketTest
private static final int LOCK_PORT = 12345;
// replace this method with whatever you really want to do
private void doSomething()
System.out.println("Pretending to do something...");
try
synchronized (this)
while (true) this.wait();
catch (InterruptedException ex)
System.out.println("This won't happen.");
public static void main (String args[])
ServerSocket lockSocket = null;
try
lockSocket = new ServerSocket(LOCK_PORT);
catch (IOException ex)
System.err.println("An instance of SocketTest is already running.");
System.exit(-1);
SocketTest socketTest = new SocketTest();
socketTest.doSomething();