27 lines
766 B
Java
27 lines
766 B
Java
// polymorphism/shape/RandomShapes.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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// A "factory" that randomly creates shapes
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package polymorphism.shape;
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import java.util.*;
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public class RandomShapes {
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private Random rand = new Random(47);
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public Shape get() {
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switch(rand.nextInt(3)) {
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default:
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case 0: return new Circle();
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case 1: return new Square();
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case 2: return new Triangle();
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}
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}
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public Shape[] array(int sz) {
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Shape[] shapes = new Shape[sz];
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// Fill up the array with shapes:
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for(int i = 0; i < shapes.length; i++)
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shapes[i] = get();
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return shapes;
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}
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}
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