Arraylist

Arraylist is a class which implements List interface. It is widely used because of the functionality and flexibility it offers. Most of the developers choose Arraylist over Array as it’s a very good alternative of traditional java arrays.
Example:

import java.util.*;

public class ArrayListExample {
   public static void main(String args[]) {
        ArrayList<String> obj = new ArrayList<String>();
/*This is how elements should be added to the array list*/
	  obj.add("Nabin");
	  obj.add("Rabin");
	  obj.add("Sabin");
	  obj.add("Rashmi");
	  obj.add("Kripa");

	  /* Displaying array list elements */
	  System.out.println("Currently the array list has following elements:"+obj);

	  /*Add element at the given index*/
	  obj.add(0, "abc");
	  obj.add(1, "xyz");

	  /*Remove elements from array list like this*/
	  obj.remove("Rashmi");
	  obj.remove("Kripa");

	  System.out.println("Current array list is:"+obj);

	  /*Remove element from the given index*/
	  obj.remove(1);

	  System.out.println("Current array list is:"+obj);
   }
}

Output:

Currently the array list has following elements:[Nabin, Rabin, Sabin, Rashmi, Kripa]
Current array list is:[abc, xyz, Nabin, Rabin, Sabin]
Current array list is:[abc, Nabin, Rabin, Sabin]