java.util.ArrayList Implementation # 1

/*

     ArrayList implementation

     Creating ArrayList of String

*/

/*

     ArrayList class implements the List interface

     The List interface extends the Collection Interface

*/

import java.util.*;

class Main

{

     public static void main(String args[])

     {

           ArrayList a=new ArrayList();

          

           a.add("Hello");

           a.add("Lavish");

           a.add("Kothari");

           a.add("How");

           a.add("are");

           a.add("You!!!");

          

           System.out.println();

           System.out.println("The contents of Collection - a are :\n"+a);

           System.out.println();

          

           /* removing element from ArrayList by specifing the Object*/

           a.remove("Kothari"); // from the Collection Interface

           System.out.println("The contents of Collection - a after deleting \"Kothari\" are :\n"+a);

           System.out.println();

          

           /* removing element from ArrayList by specifing the index*/

           a.remove(0); // from the List Interface

           System.out.println("The contents of Collection - a after deleting 0th index are :\n"+a);

           System.out.println();

           System.out.println("the size of your collection a is : "+a.size());

          

           System.out.println();

           /* obtaining an array from the ArrayList */

           Object str[]=a.toArray();

          

           System.out.println("Your array elements are :");

           for(Object s:str)

                System.out.println(s.toString());

          

     }

}