Fifo.java

import java.util.ArrayList;

public class Fifo{
	protected ArrayList<String> s;
	{
		s = new ArrayList<>(10); //csak azért, hogy használjak már inicializáló blokkot is
	}
	public synchronized void put(String e) throws InterruptedException
	{
		if(s.size()>=10)
		{
			this.wait();
		}
		this.notifyAll();
		s.add(e);
		System.out.println("produced" + " " + e + " " + 
							System.currentTimeMillis());
	}
	
	synchronized String get() throws InterruptedException
	{
		if(s.size()<=0)
		{
			this.wait();
		}
		this.notifyAll();
		String ret=s.get(0);
		s.remove(ret);
		return ret;
	}
}