java秒錶比較（java秒錶類）

本文目錄一覽：

• 1、用java編寫一個類實現秒錶的功能
• 2、java怎樣設計一個數字秒錶？
• 3、用JAVA寫秒錶
• 4、Java 秒錶

用java編寫一個類實現秒錶的功能

java System.currentTimeMillis() 就是獲取當前的毫秒數

開始時記錄 istart= System.currentTimeMillis();

結束時 記錄 iend= System.currentTimeMillis()；

分鐘就是 Math.round((iend-istart)/(60*1000));

那 秒數 就是 Math.round((iend-istart)/1000)%60

再開啟一個定時器，定時獲取 itmp= System.currentTimeMillis()；計算分鐘和秒數 顯示出來

顯示動態在跳得秒和分

java怎樣設計一個數字秒錶？

思路：

1.聲明變量：【開始時間】，【結束時間】，【總時間】。都聲明成long類型。

2.建立四個按鈕，【開始】【暫停】【繼續】【停止】

3.【開始】綁定方法：把系統當前時間賦值給【開始時間】=System.currentTimeMillis();

4.【暫停】綁定方法：把系統當前時間賦值給【結束時間】=System.currentTimeMillis();

然後【結束時間】減去【開始時間】的值賦給【總時間】並顯示出來。

5.【繼續】綁定方法：把系統當前時間賦值給【開始時間】=System.currentTimeMillis();

6.【停止】綁定方法：把系統當前時間賦值給【結束時間】=System.currentTimeMillis();

然後【結束時間】減去【開始時間】的值賦給【總時間】並顯示出來。

用JAVA寫秒錶

package test;

import javax.swing.*;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.awt.*;

import java.util.Date;

import java.text.SimpleDateFormat;

/**

* pFile: StopWatch.java/p

* pDescription: /p

* pa href=””BIOZ.info/a Copyright (c) 2004/p

*

* @author a href=”mailto:chancewang78@hotmail.com”Chance/a

*/

public class StopWatch extends JFrame {

JButton btnStart,btnStop;

JLabel label;

Timer timer;

public StopWatch() {

label=new JLabel(“00:00:00.000”);

btnStart=new JButton(“start”);

btnStop=new JButton(“stop”);

final int delay=100;

final Date startTime=new Date();

final SimpleDateFormat sdf=new SimpleDateFormat(“HH:mm:ss.S”);

final Action taskPerformer = new AbstractAction() {

public void actionPerformed(ActionEvent evt) {

//顯示時間

Date d=new Date(System.currentTimeMillis()-startTime.getTime()-28800000);

label.setText(sdf.format(d));

label.repaint();

}

};

btnStart.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent evt) {

startTime.setTime(new Date().getTime());

timer=new Timer(delay, taskPerformer);

timer.start();

}

});

btnStop.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent evt) {

if(timer!=nulltimer.isRunning())

timer.stop();

}

});

Container c=getContentPane();

c.add(label,BorderLayout.NORTH);

c.add(btnStart,BorderLayout.CENTER);

c.add(btnStop,BorderLayout.SOUTH);

}

public static void main(String[] args) {

javax.swing.SwingUtilities.invokeLater(new Runnable() {

public void run() {

createAndShowGUI();

}

});

}

private static void createAndShowGUI() {

StopWatch window=new StopWatch();

window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

window.pack();

window.setVisible(true);

}

}

Java 秒錶

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”;

// 計數線程

private CountingThread thread = new CountingThread();

// 記錄程序開始時間

private long programStart = System.currentTimeMillis();

// 程序一開始就是暫停的

private long pauseStart = programStart;

// 程序暫停的總時間

private long pauseCount = 0;

private JLabel label = new JLabel(INITIAL_LABEL_TEXT);

private JButton startPauseButton = new JButton(“開始”);

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(“暫停”);

} else {

pauseStart = System.currentTimeMillis();

thread.stopped = true;

startPauseButton.setText(“繼續”);

}

}

};

private ActionListener resetButtonListener = new ActionListener() {

public void actionPerformed(ActionEvent e) {

pauseStart = programStart;

pauseCount = 0;

thread.stopped = true;

label.setText(INITIAL_LABEL_TEXT);

startPauseButton.setText(“開始”);

}

};

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(); // 計數線程一直就運行着

}

// 為窗體面板添加邊框

private void setupBorder() {

JPanel contentPane = new JPanel(new BorderLayout());

contentPane.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));

this.setContentPane(contentPane);

}

// 配置按鈕

private void setupButtonsPanel() {

JPanel panel = new JPanel(new FlowLayout());

panel.add(startPauseButton);

panel.add(resetButton);

add(panel, BorderLayout.SOUTH);

}

// 配置標籤

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(“計時器”);

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毫秒更新一次顯示

} catch (InterruptedException e) {

e.printStackTrace();

System.exit(1);

}

}

}

// 將毫秒數格式化

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);

}

}

}

你可以試試，希望能幫到你！