65 lines
2.0 KiB
Java
65 lines
2.0 KiB
Java
// patterns/recyclea/RecycleA.java
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// (c)2021 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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// Recycling with reflection.
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// {java patterns.recyclea.RecycleA}
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package patterns.recyclea;
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import java.util.*;
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import java.util.function.*;
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import java.util.stream.*;
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import patterns.trash.*;
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class SimpleFactory {
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static final
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List<Function<Double, Trash>> constructors =
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Arrays.asList(
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Aluminum::new, Paper::new, Glass::new);
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static final int SIZE = constructors.size();
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private static SplittableRandom rand =
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new SplittableRandom(42);
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public static Trash random() {
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return constructors
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.get(rand.nextInt(SIZE))
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.apply(rand.nextDouble());
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}
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}
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public class RecycleA {
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public static void main(String[] args) {
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List<Trash> bin =
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Stream.generate(SimpleFactory::random)
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.limit(10)
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.collect(Collectors.toList());
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Bins bins = new Bins(bin);
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bins.show();
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}
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}
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/* Output:
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Aluminum weight: 0.34 * price: 1.67 = 0.57
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Aluminum weight: 0.62 * price: 1.67 = 1.03
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Aluminum weight: 0.49 * price: 1.67 = 0.82
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Aluminum weight: 0.50 * price: 1.67 = 0.83
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Total Aluminum value = 3.26
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Paper weight: 0.69 * price: 0.10 = 0.07
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Total Paper value = 0.07
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Glass weight: 0.16 * price: 0.23 = 0.04
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Glass weight: 0.87 * price: 0.23 = 0.20
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Glass weight: 0.80 * price: 0.23 = 0.18
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Glass weight: 0.52 * price: 0.23 = 0.12
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Glass weight: 0.20 * price: 0.23 = 0.05
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Total Glass value = 0.59
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Total Cardboard value = 0.00
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Glass weight: 0.16 * price: 0.23 = 0.04
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Aluminum weight: 0.34 * price: 1.67 = 0.57
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Glass weight: 0.87 * price: 0.23 = 0.20
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Glass weight: 0.80 * price: 0.23 = 0.18
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Aluminum weight: 0.62 * price: 1.67 = 1.03
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Aluminum weight: 0.49 * price: 1.67 = 0.82
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Glass weight: 0.52 * price: 0.23 = 0.12
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Glass weight: 0.20 * price: 0.23 = 0.05
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Aluminum weight: 0.50 * price: 1.67 = 0.83
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Paper weight: 0.69 * price: 0.10 = 0.07
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Total Trash value = 3.91
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*/
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