应该用线程里面的Timer来控制package com.sy.game.test;
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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();
}
}
package test;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Test5 extends Applet {
private final Panel pan = new Panel();
private final Label time = new Label();
private final Button btnGo = new Button("开始");
private final Button btnPouse = new Button("暂停");
private final Button btnReset = new Button("复位");
private final StopwatchThread swThread = new StopwatchThread();
private class btnGoListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
swThread.go();
btnGo.setEnabled(false);
}
}
private class btnPouseListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if(btnGo.isEnabled()){
return ;
}
if (btnPouse.getLabel().equals("继续")) {
swThread.go();
btnPouse.setLabel("暂停");
} else if (btnPouse.getLabel().equals("暂停")) {
swThread.noGo();
btnPouse.setLabel("继续");
}
}
}
private class btnResetListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
swThread.reset();
btnGo.setEnabled(true);
btnGo.setLabel("开始");
btnPouse.setLabel("暂停");
}
}
private class StopwatchThread extends Thread {
private boolean going = false;
private long prevElapsed = 0;
private Date startDate = new Date();
private long elapsedTime() {
return prevElapsed +
(going ? new Date().getTime() - startDate.getTime() : 0);
}
private String msToString(long time) {
System.out.println(time+" "+((0*60+2)*1000+999));
if(((99*60+59)*1000+983)=time((99*60+59)*1000+999)=time){//((0*60+2)*1000+983)=time((0*60+2)*1000+999)=time
if (time % 1000 990)
time += 2;
swThread.noGo();
}
String ms, sec, min;
if (time % 10 = 5)
time += 5;
ms = Long.toString(time % 1000);
while (ms.length() 3)
ms = "0" + ms;
ms = ms.substring(0, ms.length() - 1);
time /= 1000;
sec = Long.toString(time % 60);
if (sec.length() == 1) sec = "0" + sec;
time /= 60;
min = Long.toString(time);
return min + ":" + sec + "." + ms;
}
public void go() {
startDate = new Date();
going = true;
}
public void noGo() {
prevElapsed = elapsedTime();
going = false;
}
public void reset() {
going = false;
prevElapsed = 0;
}
public void run() {
while (true) {
time.setText(msToString(elapsedTime()));
yield();
}
}
}
public void init() {
setLayout(new GridLayout(2,2));
setBackground(Color.lightGray);
setForeground(Color.black);
pan.setLayout(new GridLayout(3,2));
pan.add(new Label("计时:"));
time.setForeground(Color.blue);
pan.add(time);
pan.add(btnGo);
pan.add(btnPouse);
pan.add(btnReset);
pan.add(new Label());
add(pan);
btnGo.addActionListener(new btnGoListener());
btnReset.addActionListener(new btnResetListener());
btnPouse.addActionListener(new btnPouseListener());
swThread.setDaemon(true);
swThread.start();
}
public static void main(String[] args) {
Test5 applet = new Test5();
Frame aFrame = new Frame("计时器");
aFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
aFrame.add(applet, BorderLayout.CENTER);
aFrame.setSize(400, 200);
applet.init();
applet.start();
aFrame.setVisible(true);
}
}
可以改变有注释的那个if语句里面的值来判断什么时候停止
import java.awt.BorderLayout;import java.awt.Container;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class TimerDemo extends JFrame implements ActionListener { private static final long serialVersionUID = 201306211111L; private JTextField screen = new JTextField("0"); private JButton start = new JButton("开始"); private JButton reset = new JButton("重置"); private JPanel panel = new JPanel(); private boolean isRunning; private int time; private int timeBetween; public TimerDemo(int timeBetween) { super("计时器"); this.timeBetween = timeBetween; try { init(); } catch (Exception e) { e.printStackTrace(); } } public TimerDemo() { super("计时器"); this.timeBetween = 100; try { init(); } catch (Exception e) { e.printStackTrace(); } } private void init() { panel.setLayout(new GridLayout()); panel.add(start); panel.add(reset); start.addActionListener(this); reset.addActionListener(this); screen.setFont(new Font("幼圆", Font.BOLD, 60)); screen.setHorizontalAlignment(JTextField.CENTER); screen.setEditable(false); Container c = getContentPane(); c.setLayout(new BorderLayout()); c.add(panel, BorderLayout.SOUTH); c.add(screen, BorderLayout.CENTER); this.setSize(200, 150); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setResizable(false); this.setLocationRelativeTo(null); this.setVisible(true); } public static void main(String[] args) { new TimerDemo(1);// 设定 1ms/次 // new TimerDemo(); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == start) { if (start.getText().equals("开始")) { start.setText("暂停"); isRunning = true; } else if (start.getText().equals("暂停")) { start.setText("开始"); isRunning = false; } } if (e.getSource() == reset) { start.setText("开始"); screen.setText("0"); isRunning = false; time = 0; } new Thread(new TimeZone()).start(); } class TimeZone implements Runnable { @Override public void run() { while (isRunning) { time++; if (time = Integer.MAX_VALUE) { screen.setText("ERROR"); JOptionPane.showMessageDialog(null, "ERROR"); isRunning = false; } screen.setText(String.valueOf(time)); try { Thread.sleep(timeBetween); } catch (Exception e) { e.printStackTrace(); } } } }}
