36 lines
1.1 KiB
Java
36 lines
1.1 KiB
Java
// patterns/trash/Bins.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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package patterns.trash;
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import java.util.*;
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public class Bins {
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final List<Trash> bin;
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final List<Aluminum> aluminum = new ArrayList<>();
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final List<Paper> paper = new ArrayList<>();
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final List<Glass> glass = new ArrayList<>();
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final List<Cardboard> cardboard = new ArrayList<>();
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public Bins(List<Trash> source) {
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bin = new ArrayList<>(source); // Copy
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bin.forEach( t -> {
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// Use reflection to discover Trash type:
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if(t instanceof Aluminum)
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aluminum.add((Aluminum)t);
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if(t instanceof Paper)
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paper.add((Paper)t);
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if(t instanceof Glass)
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glass.add((Glass)t);
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if(t instanceof Cardboard)
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cardboard.add((Cardboard)t);
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});
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}
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public void show() {
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TrashValue.sum(aluminum, "Aluminum");
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TrashValue.sum(paper, "Paper");
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TrashValue.sum(glass, "Glass");
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TrashValue.sum(cardboard, "Cardboard");
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TrashValue.sum(bin, "Trash");
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}
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}
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