Stack.java

package com.coding.basic;

import com.coding.basic.array.ArrayList;

public class Stack {
	private ArrayList elementData = new ArrayList();

	public void push(Object o) {
	}

	public Object pop() {
		return null;
	}

	public Object peek() {
		return null;
	}

	public boolean isEmpty() {
		return false;
	}

	public int size() {
		return -1;
	}
}