スレッド+スタックは生産者の消費者関係を簡単に実現する

// 
package test_produce;

public class Produce implements Runnable{
	Stack_used su;
	
	public Produce(){}
	public Produce(Stack_used su){
		this.su = su;
	}
	
// 100 
	public void run(){
		for(int i = 0; i < 100; i++){
			su.pushOne(i);
		}
	}

}



// 

package test_produce;

public class Consume implements Runnable{
	Stack_used su;
	
	public Consume(){}
	public Consume(Stack_used su){
		this.su = su;
	}
	
	public void run(){
		for(int i = 0; i < 100; i++){
			su.popOne();
		}
	}
} 


// 
package test_produce;

import java.util.Stack;

public class Stack_used {
	public static final int SIZE = 5;// 
	Stack<Integer> stack ;
	
	public Stack_used(){
		super();
	}
	public Stack_used(Stack<Integer> stack){
		this();
		this.stack = stack;
	}
	
	public void pushOne(int n){
		synchronized(this){
			if(stack.size() >= Stack_used.SIZE){
				try {
					wait();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
	
			System.out.println("Produce:"+stack.push(n));
			
			// ， 
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			
			notifyAll();
		}
	}

	public void popOne(){
		synchronized(this){
			if(stack.isEmpty()){
				try {
					wait();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
			
			System.out.println("--Consume:"+stack.pop());
			
			// ， 
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			
			notifyAll();
		}
	}
}



// 

package test_produce;

import java.util.Stack;

public class Test {
	public static void main(String[] args) {
		Stack_used su = new Stack_used(new Stack<Integer>());
		Produce produce = new Produce(su);
		Consume consume = new Consume(su);
		
		new Thread(produce).start();
		new Thread(consume).start();

	}

}
/*
// ...
 
Produce:0
Produce:1
Produce:2
Produce:3
Produce:4
--Consume:4
Produce:5
--Consume:5
--Consume:3
--Consume:2
--Consume:1
--Consume:0
Produce:6
Produce:7
Produce:8
Produce:9
--Consume:9
--Consume:8
--Consume:7
Produce:10
Produce:11
Produce:12
Produce:13
--Consume:13
--Consume:12
--Consume:11
--Consume:10
Produce:14
Produce:15
Produce:16
Produce:17
--Consume:17
--Consume:16
--Consume:15
--Consume:14
--Consume:6
Produce:18
Produce:19
--Consume:19
--Consume:18
...
 */