dynamic array in java

1import java.util.ArrayList;
2
3public class Main {
4
5    public static void main(String[] args) {
6        ArrayList<Integer> arr=new ArrayList<Integer>(10);
7
8        for(int i =0;i<12;i++){
9            arr.add(i);
10            System.out.println("VAlUE" + arr.get(i));
11            System.out.println("SIZE" + arr.size());
12        }
13    }
14}
15
16// Dynamic nature means even if we initialize the array with
17// a lesser size but at run time we need a greater size.

1ArrayList<String> mylist = new ArrayList<String>();
2mylist.add(mystring); //this adds an element to the list.

1import java.util.Arrays;
2public class DynamicArray{
3    private int array[];
4    // holds the current size of array
5    private int size;
6    // holds the total capacity of array
7    private int capacity;
8     
9    // default constructor to initialize the array and values
10    public DynamicArray(){
11        array = new int[2];
12        size=0;
13        capacity=2;
14    }
15     
16    // to add an element at the end
17    public void addElement(int element){
18        // double the capacity if all the allocated space is utilized
19        if (size == capacity){
20            ensureCapacity(2); 
21        }
22        array[size] = element;
23        size++;
24    }