package generics;

import java.util.*;
import java.lang.reflect.*;

/**
 * RUN:
 *         javac generics/GenericsCast.java && java generics.GenericsCast
 * OUTPUT:
 *         
 */

public class GenericsCast {

    public static final int SIZE = 10;

    public static void main(String[] args) {
        FixedSizeStack<String> strings = new FixedSizeStack<String>(SIZE);
        for (String s : "A B C D E F G H I J".split(" ")) {
            strings.push(s);
            // System.out.print(s + " ");
        }

        for (int i = 0; i < SIZE; i++) {
            String s = strings.pop();
            System.out.print(s + " ");
        }
    }
}

class FixedSizeStack<T> {

    private int index = 0;

    private Object[] storage;

    public FixedSizeStack(int size) {
        storage = new Object[size];
    }

    public void push(T item) { storage[index++] = item; }

    @SuppressWarnings("unchecked")
    public T pop() { return (T)storage[--index]; }
}