Implementing a Collection Class - Building Java Programs: A Back to Basics Approach - page 899

Here is a complete version of the ArrayIntList class incorporating all of the
pieces discussed in this section:
1 // Class ArrayIntList can be used to store a list of integers.
2
3 public class ArrayIntList {
4 private int [] elementData; // list of integers
5 private int size; // number of elements in the list
6
7 public static final int DEFAULT_CAPACITY = 100;
8
9 // post: constructs an empty list of default capacity
10 public ArrayIntList() {
11 this (DEFAULT_CAPACITY);
12 }
13
14 // pre : capacity >= 0
15 // post: constructs an empty list with the given capacity
16 public ArrayIntList ( int capacity) {
17 elementData = new int [capacity];
18 size = 0;
19 }
20
21 // post: returns the current number of elements in the list
22 public int size() {
23 return size;
24 }
25
26 // pre : 0 <= index < size()
27 // post: returns the integer at the given index in the list
28 public int get( int index) {
29 return elementData[index];
30 }
31
32 // post: returns comma-separated, bracketed version of list
33 public String toString() {
34 if (size == 0) {
35 return "[]";
36 } else {
37 String result = "[" + elementData[0];
38 for ( int i = 1; i < size; i++) {
39 result + = ", " + elementData[i];
40 }