ArrayList In Java Example

Chapter: Collections Last Updated: 08-04-2016 04:03:59 UTC

Program:

            /* ............... START ............... */
                
import java.util.ArrayList;

public class JavaArrayListExample {
	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("Harry");
		obj.add("Sanju");
		obj.add("JO");
		obj.add("Steve");
		obj.add("Anu");

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

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

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

		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);
	}
}
                /* ............... END ............... */
        

Output

Currently the array list has following elements:[Harry, Sanju, JO, Steve, Anu]
Current array list is:[Rahul, Justin, Sanju, JO, Anu]
Current array list is:[Rahul, Sanju, JO, Anu]

Notes:

  • ArrayList is a resizable-array implementation of the List interface.
  • Implements all optional list operations, and permits all elements, including null.

Tags

Collection, ArrayList, Java

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