java代碼倒計時 java倒計時三種簡單實現(xiàn)方式

如何在java設(shè)計的程序中加入一個倒計時功能

import java.awt.event.ActionEvent;

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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{

// 定義組件

private JLabel lblTime;

private JTextField txtInput;

private JButton btnEnter;

// 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);

// 創(chuàng)建組件

this.lblTime = new JLabel("請輸入倒計時時間");

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);

// 給JTextField注冊監(jiān)聽

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注冊監(jiān)聽

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');

}

// 點擊按鈕時的事件處理，核心！

public void btnEnter_ActionPerformed(ActionEvent ae){

// 獲得用戶輸入的倒計時時間

String strTime = this.txtInput.getText();

if(strTime.equals("")){

// 檢測用戶是否輸入

this.lblTime.setText("您尚未輸入，請輸入！");

}

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(){

// 啟動其他程序

public void run() {

System.out.print("ok");

}

}, time * 1000);

}

// 啟動窗體

public static void main(String[] args){

new TimeThreadFrame();

}

// 時間線程類

class TimeThread extends Thread{

private JLabel lblTime;

private int time;

// 構(gòu)造方法傳入，顯示事件的JLabel和倒計時的時間。

public TimeThread(JLabel lblTime, int time){

this.lblTime = lblTime;

this.time = time;

}

// run方法

public void run(){

while(time 0){

// 顯示所剩時間

this.lblTime.setText("所剩時間：" + time);

// 所剩時間減少

time--;

try {

this.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

java 設(shè)計一個簡單的倒計時

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{

// 定義組件

private JLabel lblTime;

private JTextField txtInput;

private JButton btnEnter;

// 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);

// 創(chuàng)建組件

this.lblTime = new JLabel("請輸入倒計時時間");

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);

// 給JTextField注冊監(jiān)聽

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注冊監(jiān)聽

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');

}

// 點擊按鈕時的事件處理，核心！

public void btnEnter_ActionPerformed(ActionEvent ae){

// 獲得用戶輸入的倒計時時間

String strTime = this.txtInput.getText();

if(strTime.equals("")){

// 檢測用戶是否輸入

this.lblTime.setText("您尚未輸入，請輸入！");

}

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(){

// 啟動其他程序

public void run() {

System.out.print("ok");

}

}, time * 1000);

}

// 啟動窗體

public static void main(String[] args){

new TimeThreadFrame();

}

// 時間線程類

class TimeThread extends Thread{

private JLabel lblTime;

private int time;

// 構(gòu)造方法傳入，顯示事件的JLabel和倒計時的時間。

public TimeThread(JLabel lblTime, int time){

this.lblTime = lblTime;

this.time = time;

}

// run方法

public void run(){

while(time 0){

// 顯示所剩時間

this.lblTime.setText("所剩時間：" + time);

// 所剩時間減少

time--;

try {

this.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

用java編寫一個倒計時器代碼。

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("計時器"); this.timeBetween = timeBetween; try { init(); } catch (Exception e) { e.printStackTrace(); } } public TimerDemo() { super("計時器"); 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("開始")) { start.setText("暫停"); isRunning = true; } else if (start.getText().equals("暫停")) { start.setText("開始"); isRunning = false; } } if (e.getSource() == reset) { start.setText("開始"); 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(); } } } }}

怎么編寫一個倒計時的java的程序？求具體步驟！

基于控制臺的話很簡單的，我跟你說一下大體思路吧，二話不說先來個for循環(huán)，然后輸出倒計時的數(shù)字，程序睡一秒，在輸出倒計時數(shù)字，如此循環(huán)，簡單吧，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");

}

其他基于網(wǎng)頁的還是基于用戶界面都可以使用這個思路的

java 倒計時

//搞定，代碼自己理解哈．

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

public class Clock extends JFrame

{

private Dialog dialog;

public static void main(String[] args)

{

Clock f = new Clock();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setVisible(true);

}

class MyDialog extends Dialog implements WindowListener,ActionListener

{

JLabel label;

JPanel panel1,panel2;

JButton button;

public MyDialog(Frame owner, String title, boolean modal) {

super(owner, title, modal);

// TODO Auto-generated constructor stub

label=new JLabel("時間到！");

button=new JButton("確定");

panel1=new JPanel();

panel2=new JPanel();

panel1.setLayout(new BorderLayout());

panel1.add("Center",label);

panel2.add("Center",button);

this.add("Center",panel1);

this.add("South",panel2);

this.setSize(200,200);

this.setResizable(false);

this.addWindowListener(this);

button.addActionListener(this);

}

public void windowOpened(WindowEvent e) {