StopWatch计时器

public static void main(String[] args) throws InterruptedException {
//        StopWatchTest.test0();
     StopWatchTest.test1();
}

public static void test1() throws InterruptedException {
     StopWatch sw = new StopWatch("test");
     sw.start("task1");
     // do something
    Thread.sleep(100);
    sw.stop();
    sw.start("task2");
    // do something
    Thread.sleep(200);
    sw.stop();
    System.out.println("sw.prettyPrint()~~~~~~~~~~~~~~~~~");
    System.out.println(sw.prettyPrint());
}