Removing duplicates from an array

Hi guys,

I have a file from which I'm reading a Point objects.  I put them into an array, and I need to remove any duplicates.  I think my code should work, but when I check the elements in the array, duplicates are still there. Can you please provide some feedback on what I'm doing wrong?

p.s. The code to initially fill the array works, the only problem that I have is that the duplicates are not being removed. (Lines 8 to 10)
public void fillArray(){
			array = new Point[this.arraySize()];
                        String line = fileReader.readLine();
			for(int i=0; line!=null; i++){
				array[i] = this.convertPoint(line);
                                line = fileReader.readLine();
			}
			List<Point> list = Arrays.asList(array);
			Set<Point> set = new HashSet<Point>(list);
			array = (Point[])set.toArray(new Point[]{});
	}

Open in new window

LVL 1
ubuntuguyAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Kevin CrossChief Technology OfficerCommented:
The Point must be able to be compared if I am not mistaken as the Set/HashSet will not allow duplicates, but it must have some way to tell if one Point object is equal to another Point object in order to work.
0
Kevin CrossChief Technology OfficerCommented:
If it is true that lines that are equal create Points that are equal and different lines create different Points, then this should work.

(my code may not be all the way correct, just threw it together to give you the overall concept -- you should be able to use as a basis for correcting code)

good luck.


public void fillArray(){
    Set<String> set = new HashSet<String>();
    String line = fileReader.readLine();
    for(int i=0; line!=null; i++){
        set.add(line);
        line = fileReader.readLine();
    }
    
    List<Point> list = new List<Point>();
    Iterator<String> it = set.iterator();
    while (it.hasNext()) {
        list.add(this.convertPoint(it.next());
    }
    
    array = list.toArray(array);
}

Open in new window

0
chaitu chaituCommented:
i have written a simple example which will remove dupliactes.may be it will help you.

      String[] strArray = new String[]{"Object","Array","Converted","List","List"};
               
                        
                List list = Arrays.asList(strArray);
               
                  Set<Point> set = new HashSet<Point>(list);
                  strArray = (String[])set.toArray(new String[]{});
                  for (int i = 0; i < strArray.length; i++) {
                        System.out.println(strArray[i]);      
                  }
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
ubuntuguyAuthor Commented:
Thanks guys, chaituu solution worked very well for strings, then I simply put the array of string into a new array converting each string into a point.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Java

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.