자기 실현 소비자 생산자 실례

// 
public class BookCase {
    private String book;
    private boolean available = false;

    public synchronized String get() {
        while (!available) {
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("get<==============:"+book);
        available = false;
        notifyAll();
        return book;
    }

    public synchronized void put(String newBook){
        while(available){
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("put==============>:"+newBook);
        available = true;
        notifyAll();
        book = newBook;
    }

}

// 
public class Producer extends Thread{
    private BookCase bookCase;

    public Producer(BookCase bookCase){
        this.bookCase = bookCase;
    }

    public void run(){
        for(int i=0;i<10;i++){
            String book = "Book"+i;
            bookCase.put(book);
//                try {
//                    sleep((int)Math.random()*1000);
//                } catch (InterruptedException e) {
//                    e.printStackTrace();
//                }
        }
    }

}

// 
public class Consumer extends Thread{
    private BookCase bookCase;

    public Consumer(BookCase bookCase){
        this.bookCase = bookCase;
    }

    public void run(){
        for(int i=0;i<10;i++){
            String book = bookCase.get();
//          System.out.println("Consumer "+i+" get: "+book);
        }
    }

}

// 
public class ProductConsumerTest {

    public static void main(String args[]){
        BookCase b = new BookCase();
        new Producer(b).start();
        new Consumer(b).start();
    }
}