创建一个Count Up计时器以在Java中断 [英] Creating a Count Up timer to Break in java

问题描述

我正在尝试为我正在编写的拼图应用程序实现基于计时器的评分系统。

I'm trying to implement a timer based scoring system for a puzzle application i am writing.

有人可以向我提供创建JLabel的示例案例或面板处于摆动状态，包含一个可见计数计时器（从0开始的秒数），在方法调用时停止。并返回其值。

Can someone provide me with an example case of creating a JLabel or Panel in swing, containing a visibly counting timer (in seconds from 0), which stops, on a call from a method. And returns its value.

示例：

小时：分钟：秒
[00:00 ：00]
[00:00:01] ..等等。覆盖上一个条目。

hrs:mins:seconds [00:00:00] [00:00:01] .. etc.. overwriting the previous entry.

谢谢

编辑：这是由trashgod链接的示例代码的改编：
ClockExample ，
，它使用简单的if语句显示小时分和秒......

this is an adaptation of the example code linked by trashgod: ClockExample, which uses simple if statements to display hours minutes and seconds...

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JToggleButton;
import javax.swing.Timer;

/** @see https://stackoverflow.com/questions/5528939*/
class ClockExample extends JFrame {

private static final int N = 60;
private static final String stop = "Stop";
private static final String start = "Start";
private final ClockListener cl = new ClockListener();
private final Timer t = new Timer(1000, cl);
private final JTextField tf = new JTextField(8);

public ClockExample() {
    t.setInitialDelay(0);

    JPanel panel = new JPanel();
    tf.setHorizontalAlignment(JTextField.RIGHT);
    tf.setEditable(false);
    panel.add(tf);
    final JToggleButton b = new JToggleButton(stop);
    b.addItemListener(new ItemListener() {

        @Override
        public void itemStateChanged(ItemEvent e) {
            if (b.isSelected()) {
                t.stop();
                b.setText(start);
            } else {
                t.start();
                b.setText(stop);
            }
        }
    });
    panel.add(b);

    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.add(panel);
    this.setTitle("Timer");
    this.pack();
    this.setLocationRelativeTo(null);
    this.setVisible(true);
}

public void start() {
    t.start();
}

private class ClockListener implements ActionListener {

    private int hours;
    private int minutes;
    private int seconds;
    private String hour;
    private String minute;
    private String second;

    @Override
    public void actionPerformed(ActionEvent e) {
        NumberFormat formatter = new DecimalFormat("00");
        if (seconds == N) {
            seconds = 00;
            minutes++;
        }

        if (minutes == N) {
            minutes = 00;
            hours++;
        }
        hour = formatter.format(hours);
        minute = formatter.format(minutes);
        second = formatter.format(seconds);
        tf.setText(String.valueOf(hour + ":" + minute + ":" + second));
        seconds++;
    }
}

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {

        @Override
        public void run() {
            ClockExample clock = new ClockExample();
            clock.start();
        }
    });
  }
}

再次感谢所有人！

推荐答案

有点过于复杂了。您可以使用java.util.Date和java.text.SimpleDateFormat来显示传递的时间，而不是使用秒，分钟，小时。

Thats a bit over-complicated. Instead of using seconds, minutes, hours, you could just use java.util.Date, and java.text.SimpleDateFormat for displaying the time passed.

start = new Date(); // time right now
sdf = new SimpleDateFormat("hh:mm:ss");

然后稍后显示已经过了几个小时：

Then later to show what time has passed:

Date now = new Date();
sdf.format(new Date(now.getTime() - start.getTime()); //create a date based on time passed

这将产生相同的效果，更清晰，更明确。

This will have the same effect and be much clearer and more consise.

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