/*
  Author  : Michael Robinson 
  Program : arrayListSimpleClass.java
  Purpose : How to create a Java ArrayList using for loops.
            Shows how to add elements to an ArrayList
            How to delete items 
            How to get and print data items using for loops.
       
  Updated : June 29th, 2099
*/


import java.util.ArrayList;

 
public class arrayListSimpleClass 
{
    static String lines =
                  "------------------------------------------";
    
    public static void alphaArrayList()
    {
        System.out.println( lines );
        System.out.println( " Processing ArrayList of String Data" +  
                            " Type" );
        System.out.println("              Using for Loops" );
        System.out.println( lines );
        System.out.println( " Creating ArrayList..." );
           
        //create an ArrayList object
        ArrayList<String> arrayList = new ArrayList<String>();
           	 
        System.out.println( " Adding data elements to the" +  
                            " ArrayList..." );

        //data is always added at the end of the Array List
        arrayList.add( "a" ); //adding a to Array List arrayList
        arrayList.add( "b" ); //adding b to Array List arrayList
        arrayList.add( "c" ); //adding c to Array List arrayList
        arrayList.add( "d" ); //adding d to Array List arrayList
        arrayList.add( "e" ); //adding e to Array List arrayList
        arrayList.add( "f" ); //adding fa to Array List arrayList
            		 
        System.out.println( "\n Getting data elements from " + 
                            "the ArrayList" );
        
        //Use get method of ArrayList class to retrieve an element. 
        //get( index ) returns element at the index in the ArrayList.
        //Notice that the command to retrieve an element/index from
        //and Array List is: arrayListName.get( location )
        for( int x = 0; x < arrayList.size(); x++ )
        {
            System.out.print( " " + arrayList.get(x) );
        }
                 
        //now remove elements !!! always remove from the highest" +
        //to the lowest location
        System.out.println( "\n\n Removing data elements from the " +
                            "ArrayList on index 3 = " +   
                             arrayList.get(3) +
                            "\n and index 1 = " + arrayList.get(1) );
             	    
        arrayList.remove(3); //always remove highest location first
        arrayList.remove(1);
             
        System.out.println( "\n Getting data elements from" +   
                            " ArrayList after removing" );
              
        //arrayList.size() is equivalent to array.length in arrays 
        for( int x = 0; x < arrayList.size(); x++ )
        {
            System.out.print( " " + arrayList.get(x) );
        }	    
        System.out.println( "\n" );
          
    }//end public static void alphaArrayList()
         
    
    public static void numericArrayList()
    {
        System.out.println( lines );
        System.out.println( " Processing ArrayList of Integer Data" + 
                            " Type" );
        System.out.println( "              Using for Loops" );
        System.out.println( lines );
        System.out.println( " Creating ArrayList..." );
              
        //create an ArrayList object
        ArrayList<Integer> arrayList = new ArrayList<Integer>();
          	 
        System.out.println( " Adding data elements to the" +
                            " ArrayList..." );		    

        //data is always added at the end of the Array List 
        arrayList.add( 1100 ); //adding 1100 to Array List arrayList
        arrayList.add( 2100 ); //adding 2100 to Array List arrayList
        arrayList.add( 3100 ); //adding 3100 to Array List arrayList
        arrayList.add( 4100 ); //adding 4100 to Array List arrayList
        arrayList.add( 5100 ); //adding 5100 to Array List arrayList
        arrayList.add( 6100 ); //adding 6100 to Array List arrayList
         	 
        System.out.println( "\n Getting data elements in the" +
                            " ArrayList" );
            
        //Use get method of ArrayList class to retrieve an element. 
        //get( index ) returns element at the index in the ArrayList.
        //Notice that the command to retrieve an element/index from
        //and Array List is: arrayListName.get( location )
        for( int x = 0; x < arrayList.size(); x++ )
        {
            System.out.print( " " + arrayList.get(x) );
        }
         	    
        System.out.println( "\n\n Removing data elements from the" + 
                            " ArrayList on index 3 = " + 
                              arrayList.get(3) +
                            "\n and index 1 = " + arrayList.get(1) );
          
	   //now remove some !!! always remove from the height to
        //the lowest location 
        arrayList.remove(3); //always remove highest location first
        arrayList.remove(1);
               
        System.out.println( "\n Getting data elements from" + 
                            "  ArrayList after remove" );
        
        //arrayList.size() is equivalent to array.length in arrays 
	   for( int x = 0; x < arrayList.size(); x++ )
	   {
	       System.out.print( " " + arrayList.get(x) );
	   }
         
        System.out.println( "\n" );
           		    
    }//end public static void numericArrayList()
                
            	  
    public static void main( String arg[] ) 
    {
        alphaArrayList();
          
        numericArrayList();
	            
    }//end public static void main( String arg[] ) 
      
}//end public class arrayListSimpleClass