java類比生產者消費者問題

 

package com.jzm.thread;

class Q {
 int n;
 boolean  valueSet = false;    
 synchronized int get(){        
   // 值還沒有放，等待put放值
   if (!valueSet){
       try {
     wait();
   } catch (InterruptedException e) {
    System.out.println("Interrupt caught");
   }
  }

   System.out.println("got : "+n);
   valueSet = false;
   notify();
   return n;
 }
 
 
 synchronized void put(int n){ 
   // 值放了，等待got拿走值，再放置值
   if (valueSet) {
       try {
     wait();
   } catch (InterruptedException e) {
    System.out.println("Interrupt caught");
   }
  }
  this.n = n; 
  System.out.println("put : " +n);
  valueSet = true;
  notify();  
 }
}

class Producer implements Runnable {
 Q  q; 
 public Producer(Q q){
     this.q = q;
     new Thread(this,"Producer").start();
 }
 
 @Override
 public void run() {
  int i=0;
  while(true){
   q.put(i++);  
  }
 } 
}
class Consumer implements Runnable {
  Q  q; 
    public Consumer(Q q) {  
     this.q = q;     
     new Thread(this,"Consumer").start();
    }
 @Override
 public void run() {
  // TODO Auto-generated method stub
  int i=0;
  while(true){
   q.get();  
  }
 } 
}
public class CustomerProduct {
 public static void main(String[] args) {
  
  Q q = new Q();
  new Producer(q);
  new Consumer(q);  
    System.out.println("press contro_c to stop"); 
 }

}