StopWatch ：計算程序運行時間

@Test
public void test001() throws InterruptedException {
    StopWatch stopWatch = new StopWatch("統計代碼耗時操作");

    stopWatch.start("第一個任務");
    Thread.sleep(1003);
    stopWatch.stop();

    stopWatch.start("第二個任務");
    Thread.sleep(2400);
    stopWatch.stop();

    System.out.println(stopWatch.prettyPrint());

    for (StopWatch.TaskInfo taskInfo : stopWatch.getTaskInfo()) {
        System.out.println(taskInfo.getTaskName() + ":" + taskInfo.getTimeMillis() + ":" + taskInfo.getTimeSeconds());
    }
}