extends ArrayList to create Stack : Stack « Collections Data Structure « Java

extends ArrayList to create Stack

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 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
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import java.util.ArrayList;

public class FastStack<T> extends ArrayList<T> {

    public void push(T o) {

    public T pop() {
        return remove(size() - 1);

    public boolean empty() {
        return size() == 0;

    public T peek() {
        return get(size() - 1);


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