Java多线程同步问题（和尚吃馒头问题）

     创建一个和尚类

public class Basket {
	   private int count = 100 ;
	     //和尚数量 ==没吃馒头的和尚数量
	   private int numMonks = 30 ;
	   public synchronized int getBread(Monk monk){
	          //和尚第一次吃
	          if(monk.count == 0){
	              int temp = count ;
	              count -- ;
	              numMonks -- ;
	              return temp ;
	         }
	          //和尚还可以吃的情况
	          else if(monk.count < Monk.MAX){
	              //判断是否有多余的馒头
	              if(count > numMonks){
	                  int temp = count ;
	                  count -- ;
	                  return temp ;
	              } else{
	                  return -1 ; 
	                  }
	          }
	          return -1 ;
	      }
	}

     创建一个馒头类继承Thread类创建多线程

public class Monk extends Thread{
    private String monkName ;
    private Basket basket ;
    //最少一个馒头
    public static int MIN = 1 ;
    //最多4个馒头
    public static int MAX = 4 ;
    //吃的馒头数
    public int count ;
    public Monk(Basket basket , String monkName){
        this.basket = basket ;
        this.monkName = monkName ;  }
    public void run() {
        while(true){
           int no = basket.getBread(this);
            if(no ==-1){
                break ;
           }
            else{
                count ++ ;
                System.out.println(monkName + "吃了编号为[" + no + "]的馒头");    
                } 
            }
        System.out.println(monkName + "共吃了【" + count + "】馒头"); 
        } 
    }

    创建一个测试类 

public class Test {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Basket p=new Basket();
		for(int i=0;i<30;i++){
			new Monk(p,"和尚" + (i+1)+":t").start();
		}
	}
}