12，多线程-生产者消费者问题

1，生产一个，消费多个（生产多个，消费一个）：对notify（）的线程没有判断：将if换成while

2，全部等待：notify换成notifyAll

 package songyan;

 class Resource {
    private String name;
    private int count=1;
    boolean flag=false;
    public synchronized void set(String name)
    {
        while(this.flag)
            try{this.wait();}catch(Exception e){}
        this.flag=true;    
        this.name=name+"--"+count++;
        System.out.println(Thread.currentThread().getName()+"生产者"+this.name+"------");
        this.notifyAll();        
    }
    public synchronized void out()
    {
        while(!this.flag)
            try{this.wait();}catch(Exception e){}
        System.out.println(Thread.currentThread().getName()+"消费者"+this.name);
        this.flag=false;
        this.notifyAll();
        
    }

    
 }
 class Produce implements Runnable 
 {
     private Resource res;
     Produce(Resource res )
     {
         this.res=res;
     }
     public void run()
     {
         while(true)
         {
             res.set("+商品+");
         }
     }
 }
 class consume implements Runnable
 {
     private Resource res;
     consume(Resource res )
     {
         this.res=res;
     }
     public void run()
     {
         while(true)
         {
             res.out();
         }
     }
 }
 
 public class test{
     public static void main(String[] args) {
         Resource res = new Resource();
         Produce pro = new Produce(res) ;
         consume con = new consume(res);
         Thread t1= new Thread(pro);
         Thread t2= new Thread(con);
         Thread t3= new Thread(pro);
         Thread t4= new Thread(con);
         t1.start();
         t2.start();
         t3.start();
         t4.start();
            
            
     }
 }