package test;

import java.util.Collection;

public class LinkedStack extends java.util.LinkedList implements Stack {
	
	public LinkedStack() {
		super();
	}
	
	public LinkedStack( Collection c ) {
		super(c);
	}
	

	public boolean empty() {
		return(this.size()==0);
	}

	public Object peek() {
		return(this.getFirst());
	}

	public Object pop() {
		return(this.removeFirst());
	}

	public Object push(Object item) {
		this.addFirst(item);
		return(item);
	}
}