32 lines
912 B
Java
32 lines
912 B
Java
// generics/GenericCast.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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import java.util.stream.*;
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class FixedSizeStack<T> {
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private int index = 0;
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private Object[] storage;
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public FixedSizeStack(int size) {
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storage = new Object[size];
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}
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public void push(T item) { storage[index++] = item; }
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@SuppressWarnings("unchecked")
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public T pop() { return (T)storage[--index]; }
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}
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public class GenericCast {
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public static final int SIZE = 10;
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public static void main(String[] args) {
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FixedSizeStack<String> strings =
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new FixedSizeStack<>(SIZE);
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Stream.of("A B C D E F G H I J".split(" "))
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.forEach(s -> strings.push(s));
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for(int i = 0; i < SIZE; i++)
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System.out.print(strings.pop() + " ");
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}
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}
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/* Output:
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J I H G F E D C B A
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*/
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