hj.txt

用java写的哲学家问题源代码8个哲学家吃饭问题的源代码

class chopstick{ 
boolean available; 
chopstick() 
{ 
available=true; 
} 
public synchronized void takeup(){ 

while(!available) 
{ 
      try{ 
       System.out.println("哲学家等待另一根筷子"); 
       this.wait(); 
      } 
      catch(InterruptedException e){} 
         } 
     available=false; 
     } 
     public synchronized void putdown(){ 
      available=true; 
          notify(); 
        } 
    } 
    class philosopher extends Thread{ 
     chopstick left,right; 
     int philo_num; 
     philosopher(int num,chopstick c1,chopstick c2) 
     { 
     philo_num=num; 
     left=c1; 
     right=c2; 
     } 
     public void eat(){ 
     left.takeup(); 
     right.takeup(); 
     System.out.println("哲学家"+(philo_num+1)+"正在进餐"); 
     } 
     public void think() 
     { 
     left.putdown(); 
     right.putdown(); 
     System.out.println("哲学家"+(philo_num+1)+"正在思考"); 
     } 
     public void run() 
     { 
     while(true) 
     { 
     eat(); 
     try{ 
     sleep(1000); 
     } 
     catch(InterruptedException e){} 
     think(); 
     try{ 
     sleep(1000); 
     } 
     catch(InterruptedException e){} 
     } 
     } 
  } 
  public class jh{ 
     static chopstick  []chopsticks =new chopstick[10]; 
     static philosopher []philos=new philosopher[10]; 
     public static void main(String args[]) 
     { 
      for(int i=0;i<10;i++) 
      { 
      chopsticks[i]=new chopstick(); 
      } 
      for(int i=0;i<10;i++) 
      { 
      philos[i]=new philosopher(i,chopsticks[i],chopsticks[(i+1)%10]); 
      } 
      for(int i=0;i<10;i++) 
      { 
      philos[i].start(); 
      } 
     } 
      
  }