34 lines
944 B
Java
34 lines
944 B
Java
// onjava/CountingIntegerList.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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// List of any length, containing sample data
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// {java onjava.CountingIntegerList}
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package onjava;
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import java.util.*;
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public class CountingIntegerList
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extends AbstractList<Integer> {
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private int size;
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public CountingIntegerList() { size = 0; }
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public CountingIntegerList(int size) {
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this.size = size < 0 ? 0 : size;
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}
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@Override
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public Integer get(int index) {
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return index;
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}
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@Override
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public int size() { return size; }
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public static void main(String[] args) {
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List<Integer> cil = new CountingIntegerList(30);
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System.out.println(cil);
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System.out.println(cil.get(500));
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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, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
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500
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*/
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