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java秒表代码怎么写 java秒表程序设计
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Java 秒表
package demo;
import javax.swing.*;
import java.awt.HeadlessException;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class Timer extends JFrame {
private static final long serialVersionUID = 1L;
private static final String INITIAL_LABEL_TEXT = "00:00:00 000";
// 计数线程
private CountingThread thread = new CountingThread();
// 记录程序开始时间
private long programStart = System.currentTimeMillis();
// 程序一开始就是暂停的
private long pauseStart = programStart;
// 程序暂停的总时间
private long pauseCount = 0;
private JLabel label = new JLabel(INITIAL_LABEL_TEXT);
private JButton startPauseButton = new JButton("开始");
private JButton resetButton = new JButton("清零");
private ActionListener startPauseButtonListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (thread.stopped) {
pauseCount += (System.currentTimeMillis() - pauseStart);
thread.stopped = false;
startPauseButton.setText("暂停");
} else {
pauseStart = System.currentTimeMillis();
thread.stopped = true;
startPauseButton.setText("继续");
}
}
};
private ActionListener resetButtonListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
pauseStart = programStart;
pauseCount = 0;
thread.stopped = true;
label.setText(INITIAL_LABEL_TEXT);
startPauseButton.setText("开始");
}
};
public Timer(String title) throws HeadlessException {
super(title);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocation(300, 300);
setResizable(false);
setupBorder();
setupLabel();
setupButtonsPanel();
startPauseButton.addActionListener(startPauseButtonListener);
resetButton.addActionListener(resetButtonListener);
thread.start(); // 计数线程一直就运行着
}
// 为窗体面板添加边框
private void setupBorder() {
JPanel contentPane = new JPanel(new BorderLayout());
contentPane.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
this.setContentPane(contentPane);
}
// 配置按钮
private void setupButtonsPanel() {
JPanel panel = new JPanel(new FlowLayout());
panel.add(startPauseButton);
panel.add(resetButton);
add(panel, BorderLayout.SOUTH);
}
// 配置标签
private void setupLabel() {
label.setHorizontalAlignment(SwingConstants.CENTER);
label.setFont(new Font(label.getFont().getName(), label.getFont().getStyle(), 40));
this.add(label, BorderLayout.CENTER);
}
// 程序入口
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
Timer frame = new Timer("计时器");
frame.pack();
frame.setVisible(true);
}
private class CountingThread extends Thread {
public boolean stopped = true;
private CountingThread() {
setDaemon(true);
}
@Override
public void run() {
while (true) {
if (!stopped) {
long elapsed = System.currentTimeMillis() - programStart - pauseCount;
label.setText(format(elapsed));
}
try {
sleep(1); // 1毫秒更新一次显示
} catch (InterruptedException e) {
e.printStackTrace();
System.exit(1);
}
}
}
// 将毫秒数格式化
private String format(long elapsed) {
int hour, minute, second, milli;
milli = (int) (elapsed % 1000);
elapsed = elapsed / 1000;
second = (int) (elapsed % 60);
elapsed = elapsed / 60;
minute = (int) (elapsed % 60);
elapsed = elapsed / 60;
hour = (int) (elapsed % 60);
return String.format("%02d:%02d:%02d %03d", hour, minute, second, milli);
}
}
}
你可以试试java秒表代码怎么写，希望能帮到你java秒表代码怎么写！
相关问答
Q1: 写一个计时器 JAVA代码是什么？
应该用线程里面的Timer来控制package com.sy.game.test;
import java.util.Timer;
import java.util.TimerTask;
public class TimeTask {
public static void main(String[] args) {
TimeTask tTask=new TimeTask();
tTask.timeVoid();
}
public void timeVoid(){
final Timer timer = new Timer();
TimerTask tt=new TimerTask() {
@Override
public void run() {
System.out.println("到点啦!");
timer.cancel();
}
};
timer.schedule(tt, 3000);
}
}
整合的：
/*
* java倒计时器
* shiyang
* */
package com.sy.game.test;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;
@SuppressWarnings("unused")
public class TimeController extends JFrame implements ActionListener {
private static final long serialVersionUID = 4603262282860990473L;
private static final int DEFAULT_WIDTH = 200;
private static final int DEFAULT_HEIGHT = 100;
private static final int width = Toolkit.getDefaultToolkit()
.getScreenSize().width;
private static final int height = Toolkit.getDefaultToolkit()
.getScreenSize().height;
private Container container;
private JButton btn;
private JTextField jtfTime;
private Timer tmr;
public TimeController() {
initComponents();
Timer tmr = new Timer(1000, this);
this.tmr = tmr;
setVisible(true);
}
private void initComponents() {
this.setTitle("SY秒表");
this.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
this.setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLocation((width - DEFAULT_WIDTH) / 2,
(height - DEFAULT_HEIGHT) / 2);
jtfTime = new JTextField("10");
btn = new JButton("开始倒计时");
container = getContentPane();
JPanel panel = new JPanel();
panel.add(btn);
panel.add(jtfTime);
this.add(panel);
btn.addActionListener(this);
}
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == btn) {
jtfTime.setText("10");
tmr.start();
} else {
int t;
t = Integer.parseInt(jtfTime.getText());
t--;
jtfTime.setText("" + t);
if (t = 0) {
tmr.stop();
}
}
}
public static void main(String[] args) {
TimeController timeController = new TimeController();
}
}
Q2: java 这是一个秒表，我想把显示的时间变成系统时间要怎么做，具体操作
简单的写了一个时间显示的程序 时间显示的格式 时:分:秒 毫秒
参考代码如下
import java.awt.*;
import java.awt.event.*;
import java.text.SimpleDateFormat;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Timer;//注意导入的是javax.swing.Timer; 有一些类似的包不要导错了
public class TimeTest extends JFrame {
private JLabel jlTime;
SimpleDateFormat sd = new SimpleDateFormat("hh:mm:ss SSS");//时间格式化; 样式为 时:分:秒 毫秒
public TimeTest() {
jlTime = new JLabel("",JLabel.CENTER);
jlTime.setForeground(Color.BLUE);
jlTime.setFont(new Font(Font.MONOSPACED, Font.BOLD, 25));
add(jlTime);
setTitle("雪飞潇潇 java时间Demo");
setSize(360, 160);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
//每隔10毫秒, 更新一次文本标签上的文字
Timer timer = new Timer(10, new ActionListener() {
public void actionPerformed(ActionEvent e) {
long now = System.currentTimeMillis();//获取当前系统毫秒数
String textTime=sd.format(now);//转换成规定的格式
jlTime.setText(textTime);//设置文本
}
});
timer.start();//启动timer更新时间
}
public static void main(String[] args) {
new TimeTest().setVisible(true);
}
}
----------------------分割线------------------------
当然了swing写的界面,往往比较简陋.如果选择了javaFX来做界面,.那么效果会比较漂亮, 我也写了一个效果如下图
Q3: java怎样设计一个数字秒表？
思路：
1.声明变量：【开始时间】，【结束时间】，【总时间】。都声明成long类型。
2.建立四个按钮，【开始】【暂停】【继续】【停止】
3.【开始】绑定方法：把系统当前时间赋值给【开始时间】=System.currentTimeMillis();
4.【暂停】绑定方法：把系统当前时间赋值给【结束时间】=System.currentTimeMillis();
然后【结束时间】减去【开始时间】的值赋给【总时间】并显示出来。
5.【继续】绑定方法：把系统当前时间赋值给【开始时间】=System.currentTimeMillis();
6.【停止】绑定方法：把系统当前时间赋值给【结束时间】=System.currentTimeMillis();
然后【结束时间】减去【开始时间】的值赋给【总时间】并显示出来。
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