public class Assn1{
 
   private CD[] myCDs; 
   private Date release;
   private static int counter = 0;
   private static boolean go = true;
 
   public static void main(String[] args)
   {
     while(go == true)
     {
	new Assn1();		 
     }
 
   }
 
   //-------------------------------------------------------------------------------
      //   Procedure:	Assn1
      //
      //   Summary: main driver method for program 
   //-------------------------------------------------------------------------------
    public Assn1()
	{
	  //initialize data members
	  myCDs = new CD[5]; //provide a dimension for the array
 
	  for(int i = 0; i < myCDs.length; i++)
	  {
	    //main menu for navigating program 
	    Object[] possibleValues = { "Make New Entry",
	    	                            "View Entries",
		                            "Clear Entires",
		                            "Oldest Entries First",
		                            "Newest Entries First",
		                            "Exit"};
 
	    Object selectedValue = JOptionPane.showInputDialog(null,
		                                                   "Please select one of the following:",
		                                                   "Input",
		                                                   JOptionPane.INFORMATION_MESSAGE,
		                                                   null,
		                                                   possibleValues,
		                                                   possibleValues[0]);
 
	     //user selected make a new entry 
	     if(selectedValue.equals(possibleValues[0]))
	     {	
		makeNew();
 
	     }
 
	     //view all entries in the CD array 
	     if(selectedValue.equals(possibleValues[1]))
	     {	
		viewAll();
	     }
 
	     //clear all entries in the CD array 
	     if(selectedValue.equals(possibleValues[2]))
	     {
		clearAll();
	     }
 
	     //sort by oldest first and 
	     //show the entries in that order 
	     if(selectedValue.equals(possibleValues[3]))
	     {
		JOptionPane.showMessageDialog(null,"Entries have been sorted by Oldest to Newest");
		sortByOldest();
	     }
 
	     //sort by newest first and 
	     //show entriest in that order 
             if(selectedValue.equals(possibleValues[4]))
	     {
	     	JOptionPane.showMessageDialog(null,"Entries have been sorted by Newest to Oldest");
	     	sortByNewest();
	     }
 
	     //user selected exit the program....
	     //make sure they really want to exit 
	     if(selectedValue.equals(possibleValues[5]))
	     {
	       	exitProgram();
	     }
	  }
 
	}
 
    //-------------------------------------------------------------------------------
      //   Procedure:	sortByNewest
      //
      //   Summary: sorts array values newest to oldest
   //-------------------------------------------------------------------------------
	public void sortByNewest()
	{
	    if(counter > 1)
	    {
	        CD extra = new CD();
 
	        for(int outer = 0; outer < counter - 1; outer++)
                     {
		for(int inner = 0; inner < counter - 1; inner++)
		{
		    if( myCDs[inner].getreleaseDate().before(myCDs[inner + 1].getreleaseDate()))
		{					
		   //this part i got help from robert 
	               extra = myCDs[inner];
		  myCDs[inner] = myCDs[inner + 1];
		  myCDs[inner + 1] = extra;
		}
	        }
	     }
	  }
	}
 
      //-------------------------------------------------------------------------------
        //   Procedure:	sortByOldest
        //
        //	 Summary: sorts array values oldest to newest
     //-------------------------------------------------------------------------------
      public void sortByOldest()
      {
          if(counter > 1)
          {
	 CD extra = new CD();
 
	for(int outer = 0; outer < counter - 1; outer++)
	{
	   for(int inner = 0; inner < counter - 1; inner++)
	   {
 
	       if( myCDs[inner].getreleaseDate().after(myCDs[inner + 1].getreleaseDate()))
	        {					
		//this part i got help from robert 
		extra = myCDs[inner] ;
		myCDs[inner] = myCDs[inner + 1];
		myCDs[inner + 1] = extra;
	        }
	   }
	}
          }
       }
 
    //------------------------------------------------------------------------------- 
       //   Procedure:	makeNew
       // 
       //	 Summary: creates a new entry in CD array 
     //-------------------------------------------------------------------------------
         public void makeNew()
         {
	if(counter <=4)
	{
	   try
	   {
	      //prompt user for entries 		
	     String title = JOptionPane.showInputDialog("Enter name of cd");
	     String genre = JOptionPane.showInputDialog("Enter type of music");
	     String label = JOptionPane.showInputDialog("Enter label the artist is on");
	     String artist = JOptionPane.showInputDialog("Enter artist name");
 
	     String day = JOptionPane.showInputDialog("Enter day of release");
	     int d = Integer.parseInt(day);
	     String month = JOptionPane.showInputDialog("Enter month of release"); 
	     int m = Integer.parseInt(month);
 
	     String year = JOptionPane.showInputDialog("Enter year of release");
	     int y = Integer.parseInt(year);
 
	    myCDs[counter] = new CD(artist, title, d, m, y, genre, label );
 
	    if(myCDs[counter] != null){counter++;}
	}
	catch(Exception Ex)
	{
	  JOptionPane.showMessageDialog(null, "Invalid input entered");
	}
        }
	else JOptionPane.showMessageDialog(null, "The CD array is full, you cannot add more CD's");
     }
     //-------------------------------------------------------------------------------
        //   Procedure:	viewAll
        //
        //	 Summary: displays all current entries in array 
     //-------------------------------------------------------------------------------
    public void viewAll()
    {
        String output = "";
        for(int count = 0; count < myCDs.length; count++)
        {
	if(myCDs[count] != null)
             output += myCDs[count].Display() + "\n";	 	
         }
        JOptionPane.showMessageDialog(null, output, "All cds in list", JOptionPane.INFORMATION_MESSAGE);
     }
 
   //-------------------------------------------------------------------------------
      //   Procedure:	clearAll
      //
      //	 Summary: clears all entries in the array  
   //-------------------------------------------------------------------------------
     public void clearAll()
     {
        Object[] option = { "Yes", "No" };
 
        Object decision = JOptionPane.showInputDialog(null,
                                                      "Clear All Entries in CD Collection",
                                                      "Input",
	                                        JOptionPane.INFORMATION_MESSAGE,
	                                         null,
	                                         option,
	                                         option[0]);
 
       if(decision.equals(option[0]))
       {
	for(int j = 0; j < myCDs.length; j++)
	{
	    if(myCDs[j] != null)
	    {
	         myCDs[j] = null;
                 }
	}
        }
   }
 
  //-------------------------------------------------------------------------------
     //   Procedure:	exitProgram
     //
     //	 Summary: provides means for user to exit program 
  //-------------------------------------------------------------------------------
     public void exitProgram()
     {
        Object[] option = { "Yes",
	                      "No"
	                  };
 
        Object decision = JOptionPane.showInputDialog(null,
	                                            "Do you really want to exit?",
	                                             "Input",
	                                        JOptionPane.INFORMATION_MESSAGE,
	                                             null,
	                                             option,
	                                             option[0]);
 
         if(decision.equals(option[0]))
         {
	go = false;
	System.exit( 0 );
         }
    }
 
}//end class Assn1

import javax.swing.*;
import java.util.*;
 
 
public class CD
{
 
	private String artist;
	private String title;
	private Calendar releaseDate;
	private String label;
	private String genre;
 
 
	public CD(String a, String t, int d, int m, int y, String l, String g)
	{
 
		setArtist(a);
		setTitle(t);
		setreleaseDate(m,d,y) ;
		setLabel(l);
		setGenre(g);
 
	}
	public CD(){
	}
 
	//set methods 
	public void setTitle(String t)
	{
		title = t;
	}
	public void setreleaseDate(int m, int d, int y)
	{
		Calendar releaseDate = new GregorianCalendar(y,m,d);
		this.releaseDate = releaseDate;
 
	}
 
	public void setArtist(String a)
	{
		artist = a;
 
	}   
 
	public void setLabel(String l)
	{
		label = l;
 
	}
 
	public void setGenre(String g)
	{
		genre = g;
 
	}
 
	//get methods 
	public String getTitle()
	{
	    return title;
	}
 
	public Calendar getreleaseDate()
	{
	    return releaseDate;
	}
 
	public String getArtist()
	{
	    return artist;
	}
 
	public String getLabel()
	{
	    return label;
	}
 
	public String getGenre()
	{
	    return genre;
	}
 
	public  String Display()
	{
 
		String output= "";
		output += this.getTitle() + " " + this.getArtist() + " " + label + 
		" " + releaseDate.get(Calendar.MONTH) + "/" + releaseDate.get(Calendar.DATE) + 
		"/" + releaseDate.get(Calendar.YEAR) + " " + genre;
 
		return output;
	}
 
 
}