class ProduceDemo
{
public static void main(String[] args)
{
Resource r=new Resource();
Producer pro= new Producer(r);
Consumer con=new Consumer(r);
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();
}}
class Resource
{
private String name;
private int count=1;
private boolean flag=false;
public synchronized void set(String name)
{
if(flag)
try{wait();}catch(Exception e){}
this.name=name+"........."+count++;
System.out.println(Thread.currentThread().getName()+"....生产者......"+this.name);
flag=true;
this.notify();
}
public synchronized void out(String name)
{
if(!flag)
try{wait();} catch(Exception e){}
this.name=name+"........."+count;//有这条语句打印会调用“res.out("消费商品");”语句。
//掉这句话为什么会调用Producer类中的““res.set("商品");”呢?奇怪了 怎么会调用到Producer类中来?
System.out.println(Thread.currentThread().getName()+"....消费者......"+this.name);
flag=false;
this.notify();
}}
class Producer implements Runnable
{
private Resource res;
Producer(Resource res)
{
this.res=res;
}
public void run()
{
while(true)
{
res.set("商品");
}}}
class Consumer implements Runnable
{
private Resource res;
Consumer(Resource res)
{
this.res=res;
}
public void run()
{
while(true)
{
res.out("消费商品");
}}}
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