ExpandArray.java
|
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 30 31 32 33 34 35 36 |
public class ExpandArray { private int[] arr; private int count; public ExpandArray(int initialSize){ arr = new int[initialSize]; count = 0; } private void expandArray(){ int[] newArr = new int[2 * arr.length]; for (int i = 0; i < count; i++) { newArr[i] = arr[i]; } arr = newArr; } public void add(int i){ if (count == arr.length ){ expandArray(); } arr[count++] = i; } public int get(int i){ return arr[i]; } public void printArray(){ System.out.println("Array of length: " + arr.length + " with " + count + " elements."); for (int i = 0; i < count; i++){ System.out.print(arr[i] + " "); } System.out.println(); } } |
Main.java
|
1 2 3 4 5 6 7 8 9 10 11 |
public class Main{ public static void main(String[] args){ ExpandArray ea = new ExpandArray(2); ea.printArray(); ea.add(1); ea.add(2); ea.printArray(); ea.add(3); ea.printArray(); } } |