java記錄方法計時工具類StopWatch

import org.springframework.util.StopWatch;
public static void main(String[] args) throws InterruptedException {
        StopWatch sw = new StopWatch("測試計時工具類StopWatch");
        sw.start("第一次計時");
        Thread.sleep(100);
        sw.stop();
        sw.start("第二次計時");
        Thread.sleep(200);
        sw.stop();
        System.out.println(sw.prettyPrint());
    }

輸出結果如下:
StopWatch ‘測試計時工具類StopWatch’: running time (millis) = 302

ms	%	Task name
00101	033%	第一次計時
00201	067%	第二次計時