10例子17.txt

这是一本java基础教程 对新手上路有很大帮助

import javax.swing.*;
import java.awt.*;
import javax.swing.border.*;
public class Example10_17{
    public static void main(String args[]){
        new BarWin(); 
    } 
}
class BarWin extends JFrame implements Runnable{
    JProgressBar pbar1,pbar2;
    Thread thread1,thread2;
    JTextField text1,text2;
    int number=50;
    BarWin(){
        pbar1=new JProgressBar(0,number);
        pbar2=new JProgressBar(0,number); 
        pbar1.setStringPainted(true);
        pbar2.setStringPainted(true);
        text1=new JTextField(10); 
        text2=new JTextField(10); 
        thread1=new Thread(this);
        thread2=new Thread(this);
        Box boxV1=Box.createVerticalBox();
        boxV1.add(pbar1);
        boxV1.add(pbar2);
        Box boxV2=Box.createVerticalBox();
        boxV2.add(text1);
        boxV2.add(text2);
        Box baseBox=Box.createHorizontalBox();
        baseBox.add(boxV1);
        baseBox.add(boxV2);
        setLayout(new FlowLayout());
        add(baseBox); 
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(10,10,300,300);
        setVisible(true);
        thread1.start();
        thread2.start();  
    }
    public void run(){
        if(Thread.currentThread()==thread1){
           for(int i=1;i<=number;i++){
                text1.setText("第"+i+"项="+f(i));
                pbar1.setValue(i);
                try{  Thread.sleep(500);
                }  
                catch(InterruptedException e){}
           }
        }
        if(Thread.currentThread()==thread2){
           long a1=1,a2=1,a=a1;
           int i=1;
           while(i<=number){
                if(i>=3){
                   a=a1+a2;
                   a1=a2;
                   a2=a;
                }
                text2.setText("第"+i+"项="+a);
                pbar2.setValue(i);
                i++;
                try{ Thread.sleep(500);
                }  
                catch(InterruptedException e){}
           }
        }
    }
    long f(int n){
       long c=0;
       if(n==1||n==2)
          c=1;
       else if(n>1)
          c=f(n-1)+f(n-2);
       return c; 
    }
}