一个生产者与消费者的简单编程案例

来源：互联网发布：sql with as 递归编辑：程序博客网时间：2024/05/16 09:22

package com.xmut.pm;

public class Test2 {

public static void main(String[] args) {
  A a = new A();
  Produce pd = new Produce(a);
  Sale sl = new Sale(a);
  Thread t = new Thread(pd, "生产者");
  Thread t1 = new Thread(sl, "消费者");
  t.start();
  t1.start();
  try {
   Thread.sleep(5000);
   System.out.println("六点下班了");
   System.exit(0);
  } catch (InterruptedException e) {
   e.printStackTrace();
  }
}

}

class A {
int cp = 0;

public synchronized void produce() {
  cp++;
  System.out.println(Thread.currentThread().getName() + "生产了一个馒头");
  System.out.println("现有的商品数量:" + cp);
  this.notifyAll();
}

public synchronized void sale() {
  try {
   Thread.sleep(200);
   cp--;
   System.out.println(Thread.currentThread().getName() + "销售一个馒头");
   System.out.println("现有的商品数量:" + cp);
   this.notifyAll();
  } catch (InterruptedException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

public synchronized void waitforproduce() {
  while (cp <= 0) {
   try {
    System.out.println("等待生产中...........");
    this.wait();
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
}

public synchronized void waitforsale() {
  while (cp >= 5) {
   try {
    System.out.println("等待销售中...........");
    this.wait();
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
}
}

class Produce implements Runnable {
A a;

public Produce(A a) {
this.a = a;
}

public void run() {
while (true) {

   a.waitforsale();
   try {
    Thread.sleep(200);
    a.produce();
   } catch (InterruptedException e) {
    e.printStackTrace();
   }

}
}
}

class Sale implements Runnable {
A a;

public Sale(A a) {
this.a = a;
}

@Override
public void run() {

  while (true) {
   a.waitforproduce();
   try {
    Thread.sleep(200);

    a.sale();
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }

}
}
}

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