public class VolatileTest1 implements Runnable {

    private static long[] longArray = { 0x000000A00000000Dl,
	    0x0000000B000000C0l };

    private long longValue;
//    volatile private long longValue;

    public void run() {
	int i = 0;
	int length = longArray.length;
	while (true) {
	    longValue = longArray[i % length];
	    i = (i < length) ? i + 1 : 0;
	    checkValue(longValue);
	}
    }

    private void checkValue(long l) {
	for (int i = 0; i < longArray.length; i++) {
	    if (l == longArray[i])
		return;
	}
	System.out.println("값이 다릅니다. " + Long.toHexString(l));
	// System.exit(-1);
    }

    public static void main(String[] args) {
	VolatileTest1 test = new VolatileTest1();
	Thread t1 = new Thread(test);
	Thread t2 = new Thread(test);
	t1.start();
	t2.start();
    }
}