// generics/GenericCast.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.stream.*;

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]; }

}

public class GenericCast {

public static final int SIZE = 10;

public static void main(String[] args) {

FixedSizeStack<String> strings =

new FixedSizeStack<>(SIZE);

Stream.of("A B C D E F G H I J".split(" "))

.forEach(s -> strings.push(s));

for(int i = 0; i < SIZE; i++)

System.out.print(strings.pop() + " ");

}

}

/* Output:

J I H G F E D C B A

*/