哎這個(gè)太簡(jiǎn)單了。。。
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Timer t = new Timer();
int s = 5;
TimerTask tt = new TimerTask()
{
public void run()
{
if(s 0)
s--;
}
};
t.scheduleAtFixedRate(tt,0,1000);
抱歉，之前沒(méi)看到第二個(gè)條件，重新寫(xiě)了下。
在本機(jī)上可以正確運(yùn)行。
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class TimeThreadFrame extends JFrame{
// 定義組件
private JLabel lblTime;
private JTextField txtInput;
private JButton btnEnter;
// 記錄所要啟動(dòng)的程序
private Process runningProcess;
// 構(gòu)造方法
public TimeThreadFrame(){
// 設(shè)置窗體的相關(guān)屬性
super("TimerThread");
this.setSize(300,200);
this.setLayout(null);
this.setLocation(100,50);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 創(chuàng)建組件
this.lblTime = new JLabel("請(qǐng)輸入倒計(jì)時(shí)時(shí)間");
this.lblTime.setBounds(30,20,200,30);
this.txtInput = new JTextField();
this.txtInput.setBounds(30,70,100,30);
this.btnEnter = new JButton("確定");
this.btnEnter.setBounds(150,70,70,30);
this.runningProcess = null;
// 給JTextField注冊(cè)監(jiān)聽(tīng)
this.txtInput.addKeyListener(new KeyListener(){
public void keyPressed(KeyEvent ke) {
}
public void keyReleased(KeyEvent ke) {
}
public void keyTyped(KeyEvent ke) {
txtInput_KeyTyped(ke);
}
});
// 給JButton注冊(cè)監(jiān)聽(tīng)
this.btnEnter.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
btnEnter_ActionPerformed(ae);
}
});
// 將各組件添加到窗體上
add(lblTime);
add(txtInput);
add(btnEnter);
// 顯示窗體
this.setVisible(true);
}
// 輸入時(shí)的事件處理，控制用戶只能輸入數(shù)字
public void txtInput_KeyTyped(KeyEvent ke){
if(ke.getKeyChar() '0' || ke.getKeyChar() '9'){
ke.setKeyChar('\0');
}
}
// 點(diǎn)擊按鈕時(shí)的事件處理，核心！
public void btnEnter_ActionPerformed(ActionEvent ae){
// 獲得用戶輸入的倒計(jì)時(shí)時(shí)間
String strTime = this.txtInput.getText();
if(strTime.equals("")){
// 檢測(cè)用戶是否輸入
this.lblTime.setText("您尚未輸入，請(qǐng)輸入！");
}
else{
Integer time = Integer.parseInt(strTime);
// 創(chuàng)建線程
TimeThread tt = new TimeThread(this.lblTime,time);
tt.start();
// 創(chuàng)建Timer
Timer timer = new Timer();
timer.schedule(new TimerTask(){
// 啟動(dòng)其他程序
public void run() {
try {
// 當(dāng)程序不存在時(shí)，會(huì)進(jìn)行創(chuàng)建；存在時(shí)直接調(diào)用。
runningProcess = Runtime.getRuntime().exec("D:\\Program Files\\Tencent\\QQDoctor\\QQDoctor.exe");
} catch (IOException e) {
e.printStackTrace();
}
}
}, time * 1000);
}
}
// 啟動(dòng)窗體
public static void main(String[] args){
TimeThreadFrame ttf = new TimeThreadFrame();
}
}
// 時(shí)間線程類
class TimeThread extends Thread{
private JLabel lblTime;
private int time;
// 構(gòu)造方法傳入，顯示事件的JLabel和倒計(jì)時(shí)的時(shí)間。
public TimeThread(JLabel lblTime, int time){
this.lblTime = lblTime;
this.time = time;
}
// run方法
public void run(){
while(time 0){
// 顯示所剩時(shí)間
this.lblTime.setText("所剩時(shí)間：" + time);
// 所剩時(shí)間減少
time--;
try {
this.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
應(yīng)該用線程里面的Timer來(lái)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("到點(diǎn)啦!");
timer.cancel();
}
};
timer.schedule(tt, 3000);
}
}
整合的：
/*
* java倒計(jì)時(shí)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("開(kāi)始倒計(jì)時(shí)");
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();
}
}
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("開(kāi)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("計(jì)時(shí)器"); this.timeBetween = timeBetween; try { init(); } catch (Exception e) { e.printStackTrace(); } } public TimerDemo() { super("計(jì)時(shí)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("幼圓", 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);// 設(shè)定 1ms/次 // new TimerDemo(); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == start) { if (start.getText().equals("開(kāi)始")) { start.setText("暫停"); isRunning = true; } else if (start.getText().equals("暫停")) { start.setText("開(kāi)始"); isRunning = false; } } if (e.getSource() == reset) { start.setText("開(kāi)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(); } } } }}
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