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("
		"+myformat.format(showdate));
           try {
              Thread.sleep(1000);
           } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
           }
       }
    }
    
}