public class Test
{
    // this following code won't work in java7!!
    // But works correctly in java8
    public static void main(String[] args)
    {
        /* final */ Object o = new Object() {
            public String toString()
            {
                return "hello";
            }
        };
        Runnable task1 = new Runnable()
        {
            @Override
            public void run()
            {
                System.out.println("Task #1 is running " + o);
            }
        };
//      Runnable task2 = () -> { System.out.println("Task #2 is running " + o); };
//      new Thread(task2).start();
        new Thread(task1).start();
    }
}