package duoxiancheng;  
import java.util.Random;  
class guessThread implements Runnable{  
           int num;     
        public synchronized void run() {    
            // TODO Auto-generated method stub    
            Random r = new Random();    
             num= r.nextInt(100);    
        }   
        public int getNum() {    
            return num;    
        }    
        public void setNum(int num) {    
            this.num = num;    
        }   
}
 

package duoxiancheng;  
import java.util.Random;  
public class example2{      
        public static void main(String[] args) {    
            // TODO Auto-generated method stub     
            guessThread fth=new guessThread();  
            Thread first=new Thread(fth);//正確數字執行緒  
            first.run();  
            while(true)    
            {              
               try {    
                    Thread.sleep(10);  
                    guessThread sth=new guessThread();  
                        Thread second=new Thread(sth);  
                   // Thread second=new Thread(new guessThread());  
                    second.interrupt();  //喚醒這個程序  
                    second.run();  
                    Thread.sleep(10);  
                    first.interrupt();          
                System.out.println("隨機生成的數為"+fth.getNum()+",猜的數字為："+sth.getNum());    
                if(sth.getNum()>fth.getNum())      
                    System.out.println("猜大了");    
                   
                else if(sth.getNum()<fth.getNum())  
                        System.out.println("猜小了");   
                  
                else {System.out.println("猜對了");   break;}  
                }    
            catch (InterruptedException e) {    
                // TODO Auto-generated catch block    
                e.printStackTrace();    
            }     
            }  
        }  
}