Difference between length of array and size() of ArrayList in Java

ArrayList doesn't have length() method, the size() method of ArrayList provides the number of objects available in the collection.

Array has length property which provides the length or capacity of the Array. It is the total space allocated during the intialization of the array.

import java.util.ArrayList;
public class LengthVsSize {
public static void main(String[] args) {
	//creating array of 10 elements
	int arr[]=new int[10];
	//storing 2 elements
	arr[0]=10;
	arr[1]=12;
	//printing length of array
	System.out.println(arr.length);//10
	
	//Creating ArrayList
	ArrayList<String> list=new ArrayList<String>();
	//storing 2 elements
	list.add("ankit");
	list.add("nippun");
	//printing size of ArrayList
	System.out.println(list.size());//2
}
}

Output: