StopWatch

package com.kq.guava.stopwatch;

import com.google.common.base.Stopwatch;

import java.util.concurrent.TimeUnit;

/**
 * Created by kq on 18/9/29.
 */
public class StopWatchDemo {

    public static void main(String[] args) throws InterruptedException {
        //start
        Stopwatch stopwatch = Stopwatch.createStarted();
        TimeUnit.SECONDS.sleep(3);
        System.out.println(stopwatch.stop());

        //重置
        stopwatch.reset();
        //启动
        stopwatch.start();
        TimeUnit.MILLISECONDS.sleep(10);
        System.out.println(stopwatch.stop());

        stopwatch.reset();
        stopwatch.start();
        TimeUnit.SECONDS.sleep(1);
        //转化为毫秒
        System.out.println(stopwatch.elapsed(TimeUnit.MILLISECONDS));
        //转化为秒
        System.out.println(stopwatch.elapsed(TimeUnit.SECONDS));


    }

}