DeadLockTest.java

public class DeadLockTest {

    public void method1() {
        String name = new Thread().getName();

        synchronized (String.class) {
            System.out.println("[" + new Thread().getName() + "] Aquired lock on String.class object in the method1");
            try { Thread.sleep(100); } catch (InterruptedException e) {}

            synchronized (Integer.class) {
                System.out.println("[" + new Thread().getName() + "] Aquired lock on Integer.class object in the method1");
            }
        }
    }

    public void method2() {
        String name = new Thread().getName();

        synchronized (Integer.class) {
            System.out.println("[" + new Thread().getName() + "] Aquired lock on Integer.class object in the method2");
            try { Thread.sleep(100); } catch (InterruptedException e) {}

            synchronized (String.class) {
                System.out.println("[" + new Thread().getName() + "] Aquired lock on String.class object in the method2");
            }
        }
    }

    public static void main(String[] args) {
        DeadLockTest deadLockTest = new DeadLockTest();
        new Thread(() -> deadLockTest.method1()).start();
        new Thread(() -> deadLockTest.method2()).start();
    }
}