/*
  Author  : Michael Robinson
  Program : collectionsClass.java  it4 
  Purpose : A lot like an Array that holds stuff
            "holds references to other objects
            unlike an array Collections are DYNAMIC"
            A list or a Set (types of Collections) do not
            require a size to initialize they adjust by themselves
            as you work with them. 
            List<type> = CAN contain duplicates
         
  Updated : October 28th, 2099
*/


import java.util.*;


public class collectionsClass 
{
    public static void removeFrom( 
            Collection<String> listOne, Collection<String> listTwo )
    {
        Iterator<String> removeIt = listOne.iterator();
            
        while( removeIt.hasNext() )
        {
            if( listTwo.contains( removeIt.next() ) )
            {
                removeIt.remove();
            }
        }
               
    }//end public static void removeFrom(Collection<String> listOne,
     //Collection<String> listTwo)
      
            
    public static void displayList(Collection<String> collectionObj)
    {
        //display data in namesListOne
        Iterator<String> iterCollection = collectionObj.iterator();
              
        while( iterCollection.hasNext() )
        {
            System.out.print( "  " + iterCollection.next() );
        }    
                 
        System.out.println();
                     
    }//end public static void displayList( Collection<String> 
     //collectionObj )
      
         
    public static void createList( 
                       String namesArray1[], String namesArray2[] )
    {
        //**************************
        //  listOne
        //**************************
        //add array namesArray1 to List namesListOne
        System.out.println( "\n Copying the names in the first " +
                            "array into a first list" );
        
        //create a List of Strings      
        List<String> namesListOne = new ArrayList<String>();
             
        //copy array namesArray2 to List namesListTwo
        for( String w : namesArray1 )
        {
            namesListOne.add(w);
        }    
           
        displayList( namesListOne );
            
        //add more items into List namesListOne
        System.out.println( "\n  Adding Napoleon" );
        namesListOne.add( "Napoleon" );
            
        System.out.println( "  Adding Nathalie" );
        namesListOne.add( "Nathalie" );
          
        System.out.print( "\n Printing items in first list :  " );
        displayList( namesListOne );
          
        //**************************
        //  listTwo
        //*************************
        //add array namesArray2 to List namesListTwo
        System.out.println( "\n Copying the names in the second " +    
                            "array into a second list" );

        //create a List of Strings       
        List<String> namesListTwo = new ArrayList<String>();
        
        //copy array namesArray2 to List namesListTwo
        for( String w : namesArray2 )
        {
            namesListTwo.add(w);
        }    
          
        System.out.print( "\n Printing items in second list : " );
        displayList( namesListTwo );
          
        System.out.println( "\n Removing items in second list " +
                            "from first list" );
           
        removeFrom( namesListOne, namesListTwo );
            
        System.out.print( "\n Printing items in first list :  " );
        displayList( namesListOne );
          
        System.out.print( "\n Printing items in second list : " );
        displayList( namesListTwo );
        
    }//end public static void createList( String namesArray1[], 
     //String namesArray2[] )
               
     
    public static void createArrays()
    {
        //employees in graphics group
        System.out.println( "\n Creating array with employees " +
                            "names" );

        //create an array of Strings     
        String namesArray1[] =
                      { "Lisa", "Dan", "Mike", "Jane",  "Phil" };
                         
        //create an array of Strings 
        String namesArray2[] = 
                      { "Dennis", "Lisa", "Juan", "Jane", "Manny" }; 
        
        createList( namesArray1, namesArray2 );
               
    }//end public static void createArrays()
          
         
    public static void main( String arg[] )
    {
        createArrays();
                   
    }//end public static void main( String arg[] )
     
}//end public class collectionsClass