JAva:生産者と消費者のランダムな多数生産と消費

import java.util.ArrayList;
import java.util.List;

/*
4        n   ,            40 ,            100 ,
  , 5            ，          30 。 
        ：
  ：    XX     6   
                XX    4   
        ，   ：      100  ！     ..
        ，   ：      ！     ...*/

public class Bakery {//        
	Bread bread;//    
	List list = new ArrayList();//    list         
	int holdermax = 100;//               100 
	int count = 0;

	public List getList() {
		return list;
	}

	/*
	 * public void setList(List list) { this.list = list; }
	 * 
	 * /**  list        
	 * 
	 * @throws InterruptedException
	 */
	public synchronized void push(Bread bread) throws InterruptedException {//       
		//        
		if (list.size() >= holdermax) {
			wait();//   ,   ,       
			System.out.println("  " + (list.size() + 1) + " ,   ,   ");
			return;//    return        
		}
		list.add(bread);//    
		notify();//      ,       
	}

	/**
	 *  list         
	 * 
	 * @throws InterruptedException
	 */
	public synchronized void down() throws InterruptedException {
		//        
		if (list.size() <= 0) {//   1    ,  if  
			wait();
			System.out.println("  " + list.size() + " ,   ,   ");
			return;
		}
		list.remove(0);//   list      
		notify();//      ,       
	}
	/**
	 *     0-100    
	 * 
	 * @return
	 */
	public int addRandon() {
		int b = 0;
		float a = (float) Math.random() * 100;//     0-1    , *100
		if(a==0){
			addRandon();//        0
		}
		return b = (int) a;//          
	}
}



//   

public class Consumer implements Runnable {
	//    Bakery
	Bakery bakery;

	public Consumer(Bakery bakery) {
		super();
		this.bakery = bakery;
	}
	public void reduce() {
		int b = 0;
		while (true) {
			try {
				for (int i = 0; i < bakery.addRandon(); i++) {
					if (i > 30) {
						notify();
						return;
					} else {
						bakery.down();
						b = i;
					}
				}
				System.out.println(Thread.currentThread().getName() + "   " + b + "   ");
				Thread.sleep(300);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	@Override
	public void run() {
		// TODO Auto-generated method stub
		reduce();

	}

}

//   ----------------------------------------------------
package        2;

public class Producer implements Runnable {
	//    Bakery
	Bakery bakery;

	public Producer(Bakery bakery) {
		super();
		this.bakery = bakery;
	}

	public void add() {
		int b = 0;
		while (true) {//   while,      ,         ,      
			Bread bread = new Bread();
			try {
				for (int i = 0; i < bakery.addRandon(); i++) {//      ,       
					if (i > 40) {
						notify();
						return;
					} else {
						bakery.push(bread);//     ,       
						b = i;
					}
				}
				System.out.println(Thread.currentThread().getName() + "  " + b + "   ");
				Thread.sleep(300);

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

		}
	}

	@Override
	public void run() {
		// TODO Auto-generated method stub
		add();

	}

}

--------------------------------------------
public class Bread {

}