CreateArrayLists.java

      import java.util.*;

public class CreateArrayLists
{
	public static void main(String[ ] args)
	{
		ArrayList planets = new ArrayList();

		planets.add("Mercury");
		planets.add("Venus");
		planets.add("Mars");
		planets.add("Earth");
		
		for(int k = 0; k < planets.size(); k++)
			System.out.println(planets.get(k));
	
		System.out.println();
		
		planets.set(2,"Earth");
		planets.set(3,"Mars");
					
					
      Iterator it = planets.iterator();  // ArrayLists implement the List interface

        while (it.hasNext()) {
            System.out.println(it.next());
           
        }
        
        String s = (String)planets.get(2);
        
        System.out.println(s);
			
	}
}