如何为秒表编程 [英] How to program for a stopwatch

问题描述

我从互联网上的某个地方找到了此秒表Java代码，但它似乎无法正常工作.我想知道如何修复此代码以使其正常工作.它应该具有启动，停止和重置的功能，并且应将时间显示为小时:分钟:秒.毫秒(例如:12:35:17.26).请帮助我.

I found this stopwatch java code from somewhere on the Internet, but it does not seem to be working. I was wondering how to fix this code to make it work. It's supposed to have features to start, stop and reset, and should display the time as hours:minutes:seconds.milliseconds (example: 12:35:17.26). Please help me.

public class StopWatch {

private long startTime = 0;
private long stopTime = 0;
private boolean running = false;


public void start() {
    this.startTime = System.currentTimeMillis();
    this.running = true;
}


public void stop() {
    this.stopTime = System.currentTimeMillis();
    this.running = false;
}


//elaspsed time in milliseconds
public long getElapsedTime() {
    long elapsed;
    if (running) {
         elapsed = (System.currentTimeMillis() - startTime);
    }
    else {
        elapsed = (stopTime - startTime);
    }
    return elapsed;
}


//elaspsed time in seconds
public long getElapsedTimeSecs() {
    long elapsed;
    if (running) {
        elapsed = ((System.currentTimeMillis() - startTime) / 1000);
    }
    else {
        elapsed = ((stopTime - startTime) / 1000);
    }
    return elapsed;
}




//sample usage
public static void main(String[] args) {
    StopWatch s = new StopWatch();
    s.start();
    //code you want to time goes here
    s.stop();
    System.out.println("elapsed time in milliseconds: " + s.getElapsedTime());
}
}

推荐答案

此示例显示了如何启动和停止. 此处显示了几种格式化方法.重置是一项练习.

This example shows how to start and stop a javax.swing.Timer. Several approaches to formatting are shown here. Reset is left as an exercise.

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