31 lines
785 B
Java
31 lines
785 B
Java
// references/SimplerMutableInteger.java
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// (c)2017 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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// A trivial wrapper class
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import java.util.*;
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import java.util.stream.*;
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class IntValue2 {
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public int n;
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IntValue2(int n) { this.n = n; }
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}
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public class SimplerMutableInteger {
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public static void main(String[] args) {
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List<IntValue2> v = IntStream.range(0, 10)
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.mapToObj(IntValue2::new)
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.collect(Collectors.toList());
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v.forEach(iv2 ->
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System.out.print(iv2.n + " "));
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System.out.println();
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v.forEach(iv2 -> iv2.n += 1);
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v.forEach(iv2 ->
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System.out.print(iv2.n + " "));
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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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1 2 3 4 5 6 7 8 9 10
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*/
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