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Using stopwatch to count code time

2022-07-06 05:10:00 【CBeann】

Total statistical output time

StopWatch sw = new StopWatch();
      sw.start();
      // long task simulation
      try {
    
          Thread.sleep(1000);
      } catch (Exception e) {
    
          e.printStackTrace();
      }
      sw.stop();
      System.out.println(sw.getTotalTimeMillis());

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Print out the time-consuming and proportion of all tasks in an elegant format

 StopWatch sw = new StopWatch();
      sw.start("A");
      Thread.sleep(500);
      sw.stop();
      sw.start("B");
      Thread.sleep(300);
      sw.stop();
      sw.start("C");
      Thread.sleep(200);
      sw.stop();
      System.out.println(sw.prettyPrint());