23 lines
651 B
Java
23 lines
651 B
Java
// references/ImmutableInteger.java
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// (c)2020 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://OnJava8.com for more book information.
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// The Integer class cannot be changed
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import java.util.*;
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import java.util.stream.*;
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public class ImmutableInteger {
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public static void main(String[] args) {
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@SuppressWarnings("deprecation")
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List<Integer> v = IntStream.range(0, 10)
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.mapToObj(Integer::new)
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.collect(Collectors.toList());
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System.out.println(v);
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// But how do you change the int
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// inside the Integer?
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}
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}
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/* Output:
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[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
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*/
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