34 lines
963 B
Java
34 lines
963 B
Java
// onjava/CountingIntegerList.java
|
|
// (c)2016 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
|
|
// List of any length, containing sample data
|
|
// {main: onjava.CountingIntegerList}
|
|
package onjava;
|
|
import java.util.*;
|
|
|
|
public class CountingIntegerList
|
|
extends AbstractList<Integer> {
|
|
private int size;
|
|
public CountingIntegerList() { size = 0; }
|
|
public CountingIntegerList(int size) {
|
|
this.size = size < 0 ? 0 : size;
|
|
}
|
|
@Override
|
|
public Integer get(int index) {
|
|
return index;
|
|
}
|
|
@Override
|
|
public int size() { return size; }
|
|
public static void main(String[] args) {
|
|
List<Integer> cil = new CountingIntegerList(30);
|
|
System.out.println(cil);
|
|
System.out.println(cil.get(500));
|
|
}
|
|
}
|
|
/* Output:
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
|
|
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
|
|
500
|
|
*/
|