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Thread: System.out.println Error when using Iterator

  1. #1
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    Default System.out.println Error when using Iterator

    Hi Guys

    Im new to programming and Java, but im willing to learn and trying hard using a book `Objects first with Java`.
    Im trying to create a program for a Library where Members can join and loan books. But i keep getting an Error when using the Iterator.
    My code is below:

    import java.util.ArrayList;
    import java.util.Iterator;
    /**
     * Write a description of class Library here.
     * 
     * @author (your name) 
     * @version (a version number or a date)
     */
    public class Library
    {
        private ArrayList<Book> books;
        private ArrayList<Member> members;
        private int nextMemberNumber;
     
        /**
         * Constructor for objects of class Library
         */
        public Library()
        {
            books = new ArrayList<Book>();
            members = new ArrayList<Member>();
            nextMemberNumber = 1;
        } 
        public void AddNewMember( Member newMember )
        {
          members.add(newMember);
          nextMemberNumber++;
        }
        public int NumberOfMembers()
        {
            return members.size();
        }
        public void ShowMembers( String getDetails )
        {
            Iterator<Member> it = members.iterator();
            while(it.hasNext())
            {
                Member t = it.next();
                System.out.println(t.getMember());// --------------------This is where the error is when i complie. getMmember?
            }
        }
        public int numberOfMembers()
        {
            return members.size();
        }
        }

    Any help would be great, i can see people really know what there talking about on here thats why i joined. Thanks Guys

    Willo
    Last edited by jps; December 3rd, 2012 at 04:25 PM. Reason: Added code tags


  2. #2
    Super Moderator curmudgeon's Avatar
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    Default Re: System.out.println Error when using Iterator

    Can you show us the error message?

  3. #3
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    Default Re: System.out.println Error when using Iterator

    Hi Willo can you show the error message ?

  4. #4
    Senior Member PhHein's Avatar
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    Default Re: System.out.println Error when using Iterator

    Oh, rubbish! This is a zombie.

  5. #5
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    Default Re: System.out.println Error when using Iterator

    Not sure what your error is, you could try this :

    public void ShowMembers( String getDetails )
    {
    for(int i = 0 ; i < members.size() ; i++) {
    Member member = (Member) members.get(i);
    if(member.getMember() != null ) {
    System.out.println(member.getMember());
    }
    }
    }

    I have not been able to test this as i do not have the Member class but you might as well try it

    Also you have a parameter, "getDetails" which is currently un-used

  6. #6
    Administrator copeg's Avatar
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    Default Re: System.out.println Error when using Iterator

    Quote Originally Posted by Luka View Post
    Not sure what your error is, you could try this :

    ...
    I have not been able to test this as i do not have the Member class but you might as well try it

    Also you have a parameter, "getDetails" which is currently un-used
    Welcome to the forums Luka. Please note the date on this thread as it is half a year old. Also, please read the forum announcement and the following:
    The Problem with Spoon-feeding

  7. #7
    Administrator copeg's Avatar
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    Default Re: System.out.println Error when using Iterator

    @conniesookie, welcome to the forums. Please read the posts above, in particular post #4 (this thread is half a year old) and 6 (please do not spoonfeed).

  8. #8
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    Default Re: System.out.println Error when using Iterator

    I have gone through your code, There is no question of getting the error.

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