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java倒计时编程代码 java倒计时编程代码是什么

IT技术倒计时

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(time0){
// 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();
}
}
}
}
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();}@Overridepublic 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 {@Overridepublic 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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