//ProducerConsumer1.java
public class ProducerConsumer1{ 
 public static void main(String args[]) { 
 PiggyBank pb=new PiggyBank();
 Mother m=new Mother(pb);
 Son s=new Son(pb);
 m.start();
 s.start();
 }
}
class Mother extends Thread{ //母亲类,储钱罐是它的属性
 PiggyBank pb;
 Mother(PiggyBank pb) {
 	this.pb=pb;
 }
 public void run() //母亲的行为是向储钱罐中放入10元钱,共计5次
 {
 for (int i = 1; i <= 5; i++) 
 { 
 pb.put(i);
 System.out.println("妈妈向储钱罐中放第" + i+"个十元钱");
 } 	
 }
} 
class Son extends Thread //儿子类,储钱罐是它的属性
{ 
 PiggyBank pb;
 Son(PiggyBank pb)
 {
 	this.pb=pb;
 }
 public void run() //儿子的行为是从储钱罐中取钱,一次取10元,共计5次
 {
 for (int i = 1; i <= 5; i++) 
 { 
 int number=pb.get();
 System.out.println("儿子从储钱罐中取第" + number+"个十元钱");
 } 	
 }
}
class PiggyBank //储钱罐类
{ 
 private int number; //表示储钱罐中当前这张十元钱的编号
 synchronized int get() 
 {return number;}
 synchronized void put(int i)
 {number=i;}
}