Java之线程———GUI线程（包含打字游戏和计时器俩个GUI实列）

当java程序包含图形用户界面(GUI)时，Java虚拟机在运行应用程序时会自动启动更多的线程，其中有两个重要的线程：AWT-EventQuecue 和 AWT-Windows。

AWT-EventQuecue 线程负责处理GUI事件，AWT-EventQuecue线程负责将窗体或组件绘制到桌面。JVM保证各个线程都有使用CPU资源的机会.

样列：

 package tes;

 import java.awt.Color;
 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;

 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JTextField;

 /*
  * 模拟一个打字游戏
  * */
 public class Example12_11
 {
     public static void main(String args [])
     {
         Wndow wnd= new Wndow();
       wnd.setTitle("打字游戏");
       wnd.setSleepTime(3000);
     }
 }

 class Wndow extends JFrame implements ActionListener ,Runnable
 {
     JTextField  inputLetter;
     JLabel showLetter,showScore;
     int score;
     Thread giveLetter;    //生成字母
     Wndow()
     {
        init();
        setBounds(100, 100, 400, 240);
       //setBackground(Color.green);
       setVisible(true);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
     void init()
     {
          score=0;
       setLayout(new FlowLayout());
       giveLetter = new Thread(this);
       inputLetter = new JTextField(6);
       showLetter = new JLabel(" ",JLabel.CENTER);
       showLetter.setFont(new Font("Arial",Font.BOLD,22));
       showScore =new JLabel("分数：");
       add(new JLabel("显示字母："));
       add(showLetter);
       add(new JLabel("输入字母按回车"));
       add(inputLetter);
       inputLetter.addActionListener(this);
       add(showScore);
       giveLetter.start();
     }

     @Override
     public void run() {
         // TODO Auto-generated method stub
     //    String reg="[a-zA-Z]+";   //正则表达式
         int type[]={65,97};
         while(true)
        {
          char cc=(char)(((int)(Math.random()*100))%26+type[(int)(Math.random()*1000)%2]);
          //if(reg.matches(""+cc+""))
          {
            showLetter.setText(""+cc+" ");
             validate();   //更改容器，所以得用上
           try {
                Thread.sleep(1000);
           }  catch (InterruptedException e) {
             // TODO Auto-generated catch block
             //e.printStackTrace();
           }
         }
        }
     }
     @Override
     public void actionPerformed(ActionEvent e) {
         // TODO Auto-generated method stub
         String get = inputLetter.getText().trim();  /*trim()方法的作用为删除多余的空格*/
         String show =showLetter.getText().trim();
         if(get.equals(show))
         {
             score++;
             showScore.setText(""+score+" ");
             validate();
         }
         inputLetter.setText(null);
         giveLetter.interrupt(); //吵醒休眠的线程，以便加快出字母的速度
     }
     void  setSleepTime(long aa)
     {
         try {
             Thread.sleep(aa);
         } catch (InterruptedException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
     }

------->

代码：计时器

 package tes;

 import java.awt.FlowLayout;
 import java.awt.Font;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.io.IOException;
 import java.text.SimpleDateFormat;
 import java.util.Date;

 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JTextArea;

 public class Example12_12 {
     public static void main(String args [])
      {
         wndowThread wnd = new wndowThread();
        wnd.setTitle("计时器");
      }
 }                                                            

 class wndowThread extends JFrame implements ActionListener,Runnable
 {
     Thread givetime;
     JTextArea showtime;
     JButton start,end;
     Date showdate;
     boolean flag=false,judge=true;
     SimpleDateFormat myformat = new SimpleDateFormat("hh:mm:ss");
     wndowThread()
     {

       setSize(400, 240);       /*大小*/
       setLocation(100, 100);   /*窗口位置*/
       init();
       setVisible(true);        /*可视*/
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
     void init()
     {
         givetime = new Thread(this);
         showtime = new JTextArea(10,30);
         /*showtime.setLocation(10, 8);*/
         start =new JButton("START");
         start.setFont(new Font("Arial",Font.BOLD,22));
         start.addActionListener(this);
         end = new JButton("END");
         end.addActionListener(this);
         end.setFont(new Font("Arial",Font.BOLD,22));
         setLayout(new FlowLayout());
         add(start);
         add(end);
         add(showtime);
         givetime.start();
     }
     @Override
     public void actionPerformed(ActionEvent e) {
         // TODO Auto-generated method stub
         if(e.getSource()==start)
         {
             //先判断线程是否结束
             if(!(givetime.isAlive()))
             {
               givetime =new Thread(this);
                flag=false;
                judge=true;
             }
              try {
                    givetime.start();
             } catch (Exception e1) {
                 // TODO Auto-generated catch block
               judge=false;
               showtime.setText("线程没有结束run方法之前，不要再调用start方法.");
               validate();
             }
         }
         else if(e.getSource()==end)
         {
           flag=true;
           if(judge==false)
           {
            showtime.setText("");
            validate();
           }
         }
     }    

     @Override
     public void run() {
         // TODO Auto-generated method stub
         while(true) {
            if(flag==true) return ;
            showdate =new Date();
            showtime.append("\n\t\t"+myformat.format(showdate));
            try {
               Thread.sleep(1000);
            } catch (InterruptedException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
            }
        }
     }

 }