57 lines
1.5 KiB
Java
57 lines
1.5 KiB
Java
// arrays/SimpleSetAll.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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import java.util.*;
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import static onjava.ArrayShow.*;
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class Bob {
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final int id;
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public Bob(int n) { id = n; }
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@Override
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public String toString() { return "Bob" + id; }
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}
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public class SimpleSetAll {
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public static final int SZ = 8;
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public static int val = 1;
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static char[] chars = "abcdefghijklmnopqrstuvwxyz"
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.toCharArray();
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static char getChar(int n) { return chars[n]; }
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public static void main(String[] args) {
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int[] ia = new int[SZ];
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long[] la = new long[SZ];
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double[] da = new double[SZ];
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Arrays.setAll(ia, n -> n); // [1]
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Arrays.setAll(la, n -> n);
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Arrays.setAll(da, n -> n);
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show(ia);
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show(la);
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show(da);
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Arrays.setAll(ia, n -> val++); // [2]
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Arrays.setAll(la, n -> val++);
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Arrays.setAll(da, n -> val++);
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show(ia);
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show(la);
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show(da);
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Bob[] ba = new Bob[SZ];
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Arrays.setAll(ba, Bob::new); // [3]
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show(ba);
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Character[] ca = new Character[SZ];
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Arrays.setAll(ca, SimpleSetAll::getChar); // [4]
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show(ca);
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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]
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[0, 1, 2, 3, 4, 5, 6, 7]
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[0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0]
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[1, 2, 3, 4, 5, 6, 7, 8]
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[9, 10, 11, 12, 13, 14, 15, 16]
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[17.0, 18.0, 19.0, 20.0, 21.0, 22.0, 23.0, 24.0]
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[Bob0, Bob1, Bob2, Bob3, Bob4, Bob5, Bob6, Bob7]
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[a, b, c, d, e, f, g, h]
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*/
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