Thread thread0 = new Thread(new Runnable()
        {
            @Override
            public void run()
            {
                long start = System.currentTimeMillis();
                                // 很多计算0
                long end = System.currentTimeMillis();
                System.out.println("interval 0 = " + (end - start) + "ms");
            }
        });

        Thread thread1 = new Thread(new Runnable()
        {
            @Override
            public void run()
            
                long start = System.currentTimeMillis();
                                // 很多计算1
                long end = System.currentTimeMillis();
                System.out.println("interval 1 = " + (end - start) + "ms");
            }
        });

                thread0.start();
                thread1.start();