Ping pong experiment

gistfile1.java

...
            // On the ping thread
            for (long l = 0; l < iterations; l++) {
		pingValue.set(l);
		while (pongValue.get() != l)
		    ;
	    }

...
            // On the pong thread
	    for (long l = 0; l < iterations; l++) {
		while (pingValue.get() != l)
		    ;
		pongValue.set(l);
	    }