48 lines
1.1 KiB
Java
48 lines
1.1 KiB
Java
// generics/PrimitiveGenericTest.java
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// ©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 onjava.*;
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import java.util.function.*;
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// Fill an array using a generator:
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class FArray {
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public static <T> T[] fill(T[] a, Supplier<T> gen) {
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for(int i = 0; i < a.length; i++)
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a[i] = gen.get();
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return a;
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}
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}
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public class PrimitiveGenericTest {
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public static void main(String[] args) {
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String[] strings = FArray.fill(
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new String[7], new RandomSupplier.String(10));
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for(String s : strings)
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System.out.println(s);
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Integer[] integers = FArray.fill(
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new Integer[7], new RandomSupplier.Integer());
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for(int i: integers)
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System.out.println(i);
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// Autoboxing won't save you here. This won't compile:
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// int[] b =
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// FArray.fill(new int[7], new RandIntSupplier());
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}
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}
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/* Output:
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YNzbrnyGcF
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OWZnTcQrGs
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eGZMmJMRoE
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suEcUOneOE
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dLsmwHLGEa
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hKcxrEqUCB
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bkInaMesbt
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7052
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6665
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2654
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3909
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5202
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2209
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5458
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*/
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