Question

由于我的大学，我真的被困了。我需要Java中的代码才能有Stopwatch以00:00:00(mm:ss:msms)格式显示时间。我想使用Key事件来运行，暂停和重置计时器。就像我按S一样，秒表开始，P暂停，R重置。问题是我还想为团队的数字添加关键事件，比如我按1，“团队1”闪烁，最好是发出哔哔声，依此类推2 3 {{ 1}} 4。我无法理解如何做到这一点。

我写这个打印时间只是为了尝试......

我自己尝试的东西很多自学，所以我不能理解什么是错的

Answer 1

你的意思是：

/**
 * Stopwatch is a simple timer.
 */
public class Stopwatch {

    /**
     * Stopwatch() Initialises a stopwatch.
     */
    public Stopwatch() {
        // Your code here.
    }

    /**
     * elapsed() The elapsed time in milliseconds shown on the stopwatch.
     *
     * @return double  The elapsed time in milliseconds as a double.  Returns -1.0 if no meaningful
     * value is available, i.e. if the watch is reset or has been started and not stopped.
     */
    public double elapsed() {
        // Your code here.
    }

    /**
     * start() Starts the stopwatch and clears the previous elapsed time.
     */
    public void start() {
        // Your code here.
    }

    /**
     * stop() If the stopwatch has been started this stops the stopwatch and calculates the
     * elapsed time.  Otherwise it does nothing.
     */
    public void stop() {
        // Your code here.
    }

    /**
     * reset() Resets the stopwatch and clears the elapsed time.
     */
    public void reset() {
        // Your code here.
    }

    @Override
    public String toString() {
        // Your code here.
    }

} // end class Stopwatch

如何使用java为测验系统制作秒表

1 个答案: