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java答题倒计时代码 java倒计时触发任务

求JAVA 使用 Thread 和 Timer 类来做倒计时的程序代码

抱歉,之前没看到第二个条件,重新写了下。 在本机上可以正确运行。 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{ // 定义组件 private JLabel lblTime; private JTextField txtInput; private JButton btnEnter; // 记录所要启动的程序 private Process runningProcess; // 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); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 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); this.runningProcess = null; // 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() { try { // 当程序不存在时,会进行创建;存在时直接调用。 runningProcess = Runtime.getRuntime().exec("D:\\Program Files\\Tencent\\QQDoctor\\QQDoctor.exe"); } catch (IOException e) { e.printStackTrace(); } } }, time * 1000); } } // 启动窗体 public static void main(String[] args){ TimeThreadFrame ttf = 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(); } } } }

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java 倒计时的程序

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();

}

}

}

}

满意请采纳。

用java编写一个倒计时器代码。

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(); } } } }}

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

}

}

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

关于JAVA里的倒计时代码

我试了一下没有错呀!

我还有一个:

script LANGUAGE="JavaScript"

!--你可以将新年改为其它的节日--

var urodz= new Date("January 29,2006");

var s="新年";

var now = new Date();

var ile = urodz.getTime() - now.getTime();

var dni = Math.floor(ile / (1000 * 60 * 60 * 24));

if (dni 1)

document.write("今天离"+s+"还有"+dni +"天")

else if (dni == 1)

document.write("只有2天啦!")

else if (dni == 0)

document.write("只有1天啦!")

else

document.write("好象已经过了哦!");

/script


本文标题:java答题倒计时代码 java倒计时触发任务
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