Writing a tracklist class

I am trying to write a tracklist class. It basically stores tracks for a CD as Strings. I think my code is okay. The only problem is the add method.

Code:

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class tracklist {
//define variables
        CD[] a;
        int numElements;
//no arg constructer   
  tracklist() {
                a = new CD[100];
                numElements = 0;               
  }
        public boolean add(String track) {
                if (numElements <= 100) {
                        a[numElements] = track;
                  numElements++;
                        return true;
                } else {
            return false;
        }
        }
        public int count() {
                return numElements;
        }
  public void display(int indent){
        for (int i = 1; i <= 100; i++){
                        System.out.println(i + " " + a[i]);
        }
        }
}

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I'm trying to get my code to compile but I get the following error message:

Quote:

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Assignment3.java:62: incompatible types
found : java.lang.String
required: assignment3.CD
a[numElements] = track;
^
1 error

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How would I fix this??

Your array contains CD type elements; you are trying to store a String type element in there (that's what your compiler said). For now (I think) changing your array a to a String[] will do. b.t.w. why are you trying to display 100 elements when only 'numElements' are stored in your array?

kind regards,

Jos

Thanks, I changed the array to a String[] and got it to compile. I have no idea why I was trying to display 100 elements. I didn't notice that. I'll fix that part up.