public class Rec3{
   public static void main(String[] args){
      AList list = new AList();
      Object[] names;

      list.add("Harry");
	  list.add("Tom");
      list.add("Dick");
      list.add("Harry");
      list.add("Leo");
      list.add(2,"Joan");
      System.out.println("\nList of names:");
      list.display();
      System.out.println();



      System.out.println("\nConvert list to array:");
      names = (Object[])toArray(list);            //make AList into an array of Object
      for(int k=0; k<names.length; k++)
         System.out.println((String)names[k]);    //display objects in the array



      AList nums = new AList();
      for(int k=10; k<100; k=k+10)
         nums.add(k);

      System.out.println("\nList of numbers:");
      nums.display();
      System.out.println();


      AList union = concatenate(list,nums);
      System.out.println("\nUnion of names and numbers:");
      union.display();
	  System.out.println();

      System.out.println("\nList of names:");
      list.display();
      System.out.println();


      replace(2,"George",list);
      System.out.println("\nReplace item 2 with \"George\":");
      list.display();
      System.out.println();

      replace(3,"Harry",list);
      System.out.println("\nReplace item 3 with \"Harry\":");
      list.display();
      System.out.println();

      removeAll("Harry",list);
      System.out.println("\nRemove all \"Harry\"s:");
      list.display();
      System.out.println();

      replace(1,"Bob",list);
      System.out.println("\nReplace item 1 with Bob:");
      list.display();
      System.out.println();
   }


   //Activity 1
   public static boolean replace(){

   }



   //Activity 3
   public static void removeAll(){

   }


   //Activity 4
   public static Object[] toArray(){

   }



   //Activity 5
   public static AList concatenate(){

   }
}