//
// simple example of threads in Java, showing whether your system
//      performs timeslicing:  if you see "ping" and "pong" messages
//      interleaved, your system does timeslicing; if not, it doesn't.
//
// see main method below for command-line arguments.
//

//
// a SimplerThread object repeatedly prints message msg.
//
public class SimplerThread extends Thread {

        String msg ;
        int cycles ;

        SimplerThread(String m, int c) {
                msg = m ;
                cycles = c ;
        }

        // overrides run() in Thread class to define object's
        //      behavior.
        public void run() {
                for (int i = 0 ; i < cycles ; i++) {
                        System.out.println(msg) ;
                }
        }

        // command-line arguments are integers C.
        // builds and starts two threads of type SimplerThread.
        // continues for C cycles.

        public static void main(String[] args) {

                if (args.length < 1) {
                        System.out.println("Arguments are:") ;
                        System.out.println("  cycles") ;
                        System.exit(-1) ;
                }

                int C = Integer.parseInt(args[0]) ;

                SimplerThread t1 = 
                        new SimplerThread("ping---->", C) ;
                SimplerThread t2 = 
                        new SimplerThread("<----pong", C) ;

                t1.start() ;
                t2.start() ;
        }
}