（java）生产者-消费者问题

package com.wzc.test;
//生产者消费者问题
public class Test03 {
    public static void main(String[] args) {
      Clerk clerk=new Clerk();
      Costumer c1=new Costumer(clerk);
      Procedure p1=new Procedure(clerk);
      c1.setName("消费者1号");
      p1.setName("生产者1号");
      c1.start();
      p1.start();
    }
}
class Costumer extends Thread{
    private  Clerk clerk;

    public Costumer(Clerk clerk) {
        this.clerk = clerk;
    }

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName()+"开始消费........");
        while(true){
            clerk.ConsumerP();
        }
    }
}
class Procedure extends Thread{
    private Clerk clerk;

    public Procedure(Clerk clerk) {
        this.clerk = clerk;
    }

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName()+"开始生产........");
        while(true){
            clerk.Production();
        }
    }
}
class Clerk{
    private  static int num=0;
    public synchronized  void Production(){
        if(num<20){
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            num++;
            System.out.println(Thread.currentThread().getName()+"正在生产第"+num+"个产品");
            notify();
        }else{
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }


    }
    public synchronized void ConsumerP(){
        if(num>0){
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"正在消费第"+num+"个产品");
            num--;
            notify();
        }else{
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

    }

}