实验十四

  1 package 实验十四;
  2 
  3 import java.awt.event.ActionEvent;
  4 import java.awt.event.ActionListener;
  5 import java.awt.event.KeyEvent;
  6 import java.awt.event.KeyListener;
  7 import java.util.Timer;
  8 import java.util.TimerTask;
  9 
 10 import javax.swing.JButton;
 11 import javax.swing.JFrame;
 12 import javax.swing.JLabel;
 13 import javax.swing.JTextField;
 14 
 15 public class TimeThreadFrame extends JFrame{
 16 /**
 17      * 
 18      */
 19     private static final long serialVersionUID = 1L;
 20     // 定义组件
 21     private JLabel lblTime;
 22     private JTextField txtInput;
 23     private JButton btnEnter;
 24     // 构造方法
 25     public TimeThreadFrame(){
 26         // 设置窗体的相关属性
 27         super("TimerThread");
 28         this.setSize(300,200);
 29         this.setLayout(null);
 30         this.setLocation(100,50);
 31         // 创建组件
 32         this.lblTime = new JLabel("请输入倒计时时间");
 33         this.lblTime.setBounds(30,20,200,30);
 34         this.txtInput = new JTextField();
 35         this.txtInput.setBounds(30,70,100,30);
 36         this.btnEnter = new JButton("确定");
 37         this.btnEnter.setBounds(150,70,70,30);
 38         // 给JTextField注册监听
 39         this.txtInput.addKeyListener(new KeyListener(){
 40             public void keyPressed(KeyEvent ke) {}
 41             public void keyReleased(KeyEvent ke) {}
 42             public void keyTyped(KeyEvent ke) {
 43                 //txtInput_KeyTyped(ke);
 44             }
 45         });
 46         // 给JButton注册监听
 47         this.btnEnter.addActionListener(new ActionListener(){
 48             public void actionPerformed(ActionEvent ae){
 49                 btnEnter_ActionPerformed(ae);
 50             }
 51         });
 52         // 将各组件添加到窗体上
 53         add(lblTime);
 54         add(txtInput);
 55         add(btnEnter);
 56         // 显示窗体
 57         this.setVisible(true);
 58     }
 59     // 输入时的事件处理，控制用户只能输入数字
 60     public void txtInput_KeyTyped(KeyEvent ke){
 61         if(ke.getKeyChar() < '0' || ke.getKeyChar() > '9'){
 62             ke.setKeyChar('\0');
 63         }
 64     }
 65     // 点击按钮时的事件处理
 66     public void btnEnter_ActionPerformed(ActionEvent ae){
 67         // 获得用户输入的倒计时时间
 68         String strTime = this.txtInput.getText();
 69         if(strTime.equals("")){
 70             // 检测用户是否输入
 71             this.lblTime.setText("您尚未输入，请输入！");
 72         }
 73         else{
 74             Integer time = Integer.parseInt(strTime);
 75             // 创建线程
 76             TimeThread tt = new TimeThread(this.lblTime,time);
 77             tt.start();
 78             // 创建Timer
 79             Timer timer = new Timer();
 80             timer.schedule(new TimerTask(){
 81                 // 启动其他程序
 82                 public void run() {
 83                     System.out.print("ok");
 84                 }
 85             }, time * 1000);
 86         }
 87     }
 88     // 启动窗体
 89     public static void main(String[] args){
 90         new TimeThreadFrame();
 91     }
 92 }
 93 // 时间线程类
 94 class TimeThread extends Thread{
 95     private JLabel lblTime;
 96     private int time;
 97     // 构造方法传入，显示事件的JLabel和倒计时的时间。
 98     public TimeThread(JLabel lblTime, int time){
 99         this.lblTime = lblTime;
100         this.time = time;
101     }
102     // run方法
103     public void run(){
104         while(time > 0){
105             // 显示所剩时间
106             this.lblTime.setText("所剩时间：" + time+"s");
107             // 所剩时间减少
108             time--;
109             try {
110                 Thread.sleep(1000);
111             }catch (InterruptedException e) {
112                 e.printStackTrace();
113             }
114         }
115     }
116 }