public class DeadLock {

private final static Object fistLock = new Object();

public final static Object secondLock = new Object();

public static void main(String[] args) {

new Thread(() -> testForDeadLock(fistLock, secondLock)).start();

new Thread(() -> testForDeadLock(secondLock, fistLock)).start();

}

public static void testForDeadLock(Object fistLock, Object secondLock) {

synchronized (fistLock) {

System.out.println(getCurrentThread() + ": Holding lock-" + fistLock);

try {

Thread.sleep(10);

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println(getCurrentThread() + ": Waiting for lock-" + secondLock);

synchronized (secondLock) {

System.out.println(getCurrentThread() + ": Holding both.");

}

}

}

private static String getCurrentThread() {

return Thread.currentThread().toString();

}

}