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java实现倒计时代码，java倒计时器
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java 设计一个简单的倒计时
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
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{
// 定义组件
private JLabel lblTime;
private JTextField txtInput;
private JButton btnEnter;
// 构造方法
public TimeThreadFrame(){
// 设置窗体的相关属性
super("TimerThread");
this.setSize(300,200);
this.setLayout(null);
this.setLocation(100,50);
// 创建组件
this.lblTime = new JLabel("请输入倒计时时间");
this.lblTime.setBounds(30,20,200,30);
this.txtInput = new JTextField();
this.txtInput.setBounds(30,70,100,30);
this.btnEnter = new JButton("确定");
this.btnEnter.setBounds(150,70,70,30);
// 给JTextField注册监听
this.txtInput.addKeyListener(new KeyListener(){
public void keyPressed(KeyEvent ke) {
}
public void keyReleased(KeyEvent ke) {
}
public void keyTyped(KeyEvent ke) {
txtInput_KeyTyped(ke);
}
});
// 给JButton注册监听
this.btnEnter.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
btnEnter_ActionPerformed(ae);
}
});
// 将各组件添加到窗体上
add(lblTime);
add(txtInput);
add(btnEnter);
// 显示窗体
this.setVisible(true);
}
// 输入时的事件处理，控制用户只能输入数字
public void txtInput_KeyTyped(KeyEvent ke){
if(ke.getKeyChar() '0' || ke.getKeyChar() '9'){
ke.setKeyChar('\0');
}
}
// 点击按钮时的事件处理，核心！
public void btnEnter_ActionPerformed(ActionEvent ae){
// 获得用户输入的倒计时时间
String strTime = this.txtInput.getText();
if(strTime.equals("")){
// 检测用户是否输入
this.lblTime.setText("您尚未输入，请输入！");
}
else{
Integer time = Integer.parseInt(strTime);
// 创建线程
TimeThread tt = new TimeThread(this.lblTime,time);
tt.start();
// 创建Timer
Timer timer = new Timer();
timer.schedule(new TimerTask(){
// 启动其他程序
public void run() {
System.out.print("ok");
}
}, time * 1000);
}
}
// 启动窗体
public static void main(String[] args){
new TimeThreadFrame();
}
}
// 时间线程类
class TimeThread extends Thread{
private JLabel lblTime;
private int time;
// 构造方法传入，显示事件的JLabel和倒计时的时间。
public TimeThread(JLabel lblTime, int time){
this.lblTime = lblTime;
this.time = time;
}
// run方法
public void run(){
while(time 0){
// 显示所剩时间
this.lblTime.setText("所剩时间：" + time);
// 所剩时间减少
time--;
try {
this.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
相关问答
Q1: 怎么编写一个倒计时的java的程序？求具体步骤！
基于控制台的话很简单的，我跟你说一下大体思路吧，二话不说先来个for循环，然后输出倒计时的数字，程序睡一秒，在输出倒计时数字，如此循环，简单吧，下面看程序：
public static void main(String[] args) {
for(int i=10;i0;i--){
System.out.print(i+" ");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.err.print("爆炸");
}
其他基于网页的还是基于用户界面都可以使用这个思路的
Q2: 用java编一个简单的倒计时表
先不要关闭问题，给我点时间我编出来，我也想断炼一下。
代码如下：
我这程序有点问题 ，这倒计时你讲的功能都有了，但那个暂停按钮有问题，只能用两次，我怎么也找不出原因， 我想是多线程方面的问题吧，按两下那暂停按钮就失去作用了。
--------------------------MainFrame.java------------------------------------
import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class MainFrame extends Frame{
Dispose dp= null;
int flag=1; //暂停开始的按钮,1为计时中，0为暂停。
Button button=null;
Label l1 =null;
Label l2 =null;
Label l3 = null;
TextField tfh =null;
TextField tfm =null;
TextField tfs =null;
public void lanchFrame(){
this.setLocation(200,200);
this.setSize(200,200);
this.setLayout(new FlowLayout());
l1=new Label("hour");
tfh = new TextField("1",6);
l2=new Label("minute");
tfm = new TextField("3",6);
l3=new Label("second");
tfs = new TextField("5",6);
button = new Button("stop");
this.add(l1);
this.add(tfh);
this.add(l2);
this.add(tfm);
this.add(l3);
this.add(tfs);
this.add(button);
button.addActionListener(new StartAndStopListener(this));
this.addWindowListener(new MyClosingListener());
this.dp = new Dispose(this);
this.pack();
this.setVisible(true);
}
public static void main(String args[]){
MainFrame mf=new MainFrame();
mf.lanchFrame();
mf.dp.run(mf);
}
private class MyClosingListener extends WindowAdapter{
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
}
--------------------------Dispose.java------------------------------------
public class Dispose {
int hour;
int minute;
int second;
public Dispose(MainFrame mf) {
this.hour = Integer.parseInt(mf.tfh.getText());
this.minute = Integer.parseInt(mf.tfm.getText());
this.second = Integer.parseInt(mf.tfs.getText());
}
public void run(MainFrame mf) {
while (!(hour == 0 minute == 0 second == 0) mf.flag == 1) {
if (second == 0) {
if (minute 0) {
second = 59;
minute--;
}
}
if (minute == 0) {
if (hour 0) {
minute = 59;
hour--;
}
}
second--;
mf.tfs.setText(second + "");
mf.tfm.setText(minute + "");
mf.tfh.setText(hour + "");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
------------------------------StarAndStopListener.java-----------------------------
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class StartAndStopListener implements ActionListener {
MainFrame mf = null;
public StartAndStopListener(MainFrame mf){
this.mf = mf;
}
public void actionPerformed(ActionEvent arg0) {
if(mf.flag==0){
mf.flag =1;
mf.button.setLabel("stop");
mf.dp.run(mf);
}
if(mf.flag == 1){
mf.flag = 0;
mf.button.setLabel("start");
}
}
}
Q3: java 中 倒计时 一分钟 怎么写？
代码如下:
public class TimeCountDown {
public static void countDown(int seconds) {
System.err.println("倒计时" + seconds + "秒,倒计时开始:");
int i = seconds;
while (i 0) {
System.err.println(i);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
i--;
}
System.err.println(i);
System.err.println("倒计时结束");
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
countDown(60);// 倒计时1分钟
}
}
Q4: Java怎么写一个倒计时程序 从10秒开始 到7秒的时候输出一句话 然后继续倒数到1停下输出一句话
public class Timer implements Runnable {
int i=10;
public static void main(String[] args) {
Timer t=new Timer();
Thread th=new Thread(t);
th.start();
}
@Override
public void run() {
try {
while(true){
i--;
Thread.sleep(1000);
System.out.println(i);
if(i==7){
System.out.println("还剩7秒爆炸");
}
if(i==1){
System.out.println("差点就挂了");
return;
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
应该是这样吧
Q5: 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();
}
}
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