Write a driver program implementing an ArrayList of CD object
CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com
Results 1 to 2 of 2

Thread: Write a driver program implementing an ArrayList of CD object

  1. #1
    Join Date
    Apr 2013
    Posts
    1

    Write a driver program implementing an ArrayList of CD object

    I have written the CDException class and the CD class, and now I'm trying to write a driver class to run the other classes. I have to

    Read the artist name from user
    Read the album name from user
    Read the price from user
    Read how many in stock from user

    And print what they wrote but only the valid entries. Other entries will be ignored upon printing if they just enter blanks.

    I know I have to use the scanner. But I have three different classes, the exception, CD class, and the driver class. And I have my constructors in the CD class, but when I attempted to enter the questions in the driver such as

    System.out.print("Enter Artist name: ");
    sArtist = reader.nextLine( );

    sArtist is the constructor in the CD class, and when I try to use it in the driver, it says it hasn't been declared or something like that. How do I link these all three classes, or how would I go about assigning the sArtist to what the user enters? Do i have to re-declare it in the driver as well even tho I done so in the CD class

    Here's what I have for my driver class.

    Code:
     public class CDStore{
     
      public static void main (String[ ] arg) throws Exception{
     
       ArrayList (CD) CD = new ArrayList( );
     
       try{
             CD cd1 = new CD("Muse", "The Resistance", 11.99, 20);
             System.out.println(cd1.toString( ));
             System.out.println("=========================");
       }
       catch(CDException cde){
            System.out.println(cde.getMessage( ));
            System.out.println("=========================");
       }
     
      try{
           CD cd2 = new CD("Yanni", "The Live at the Acropolis", 11.99, 0);
           System.out.println(cd2.toString( ));
           System.out.println("=========================");
       }
      catch(CDException cde){
          System.out.println(cde.getMessage( ));
          System.out.println("=========================");
      }
     
     
      try{
           CD cd3 = new CD("Muse", "Black Holes and Revelations", 10.99, 15);
           System.out.println(cd3.toString( ));
           System.out.println("=========================");
       }
      catch(CDException cde){
           System.out.println(cde.getMessage( ));
           System.out.println("=========================");
     }
     
     try{ 
          CD cd4 = new CD("Paul Mc Cartney", "All the Best", -0.99, 12);
          System.out.println(cd4.toString( ));  
          System.out.println("=========================");
       }
     catch(CDException cde){
          System.out.println(cde.getMessage( ));
          System.out.println("=========================");
      }
     
      try{
          CD cd5 = new CD("Lady Gaga", "The Fame Monster", 14.99, 44);
          System.out.println(cd5.toString( ));
          System.out.println("=========================");
       }
      catch(CDException cde){
          System.out.println(cde.getMessage( ));
          System.out.println("=========================");
      }    
     
     
     
      try{
          CD cd6 = new CD("", "California Gurls", 1.29, 4);
          System.out.println(cd6.toString( ));
          System.out.println("=========================");
       }
      catch(CDException cde){
          System.out.println(cde.getMessage( ));
          System.out.println("=========================");
      }    
     
    try{   
          CD cd7 = new CD("Pitbull", "", 11.99, 12);
          System.out.println(cd7.toString( ));
          System.out.println("=========================");
       }
     catch(CDException cde){
          System.out.println(cde.getMessage( ));
          System.out.println("=========================");
       }    
     
      }//main method ends
     
     } //program ends

  2. #2
    Join Date
    Apr 2013
    Posts
    2

    Re: Write a driver program implementing an ArrayList of CD object

    //you need to gather all the info for the constructor first so do something like

    System.out.print("Enter Artist name: ");
    String artist = reader.nextLine( );

    System.out.print("Enter CD name: ");
    String cdName = reader.nextLine( );

    System.out.print("Enter Cost : ");
    double cost = reader.nextDouble( );

    System.out.print("Enter quantity: ");
    String quantity = reader.nextInt( );

    //Then call your constructor using your variables

    CD cd9 = new CD(artist, cdName, cost, quanity);

    If you already have the the CD object already made and are trying to add each element to it then you need to identify which CD object you are adding it to such as....

    CD cd9 = new CD();
    System.out.print("Enter Artist name: ");
    cd9.sArtist = reader.nextLine( );

    Hope I understood your question and this helps.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Windows Mobile Development Center


Click Here to Expand Forum to Full Width

This is a CodeGuru survey question.


Featured


HTML5 Development Center