Convert a String to an Array and Back Again without Duplicates

Try
            List unique = new ArrayList(new HashSet(new ArrayList(Arrays.asList(array))));

You will have to use
String[] split(String regex)
method in String class and then remove duplicates manualy.

And to move the list back into a delimited string, do I need to loop through each element and add to the new String?

For the...

array = (String[])new ArrayList<String>(new LinkedHashSet<String>(new ArrayList<String>(Arrays.asList(array)))).toArray(new String[0]);

...solution, I then parse through the array and move it into a String manually, or is there something that can do the whole thing in a single line?

>>...solution, I then parse through the array and move it into a String manually, or is there something that can do the whole thing in a single line?

Yes, you do. Unfortunately there's no 'join' method in Java

Thanks CEHJ, this works perfectly based on your help:

public String removeRepeatingElementsInDelimitedString(String aStringToParse) throws Exception {
      String[] originalList = aStringToParse.split(",");
      String noduplicatesListDelimitedResult = "";
      originalList = (String[])new ArrayList<String>(new LinkedHashSet<String>(new ArrayList<String>(Arrays.asList(originalList)))).toArray(new String[0]);
      int newListLength = originalList.length;
      for(int x = 0;x<newListLength;x++)
      {
      noduplicatesListDelimitedResult = noduplicatesListDelimitedResult + originalList[x] + ",";
      }
      noduplicatesListDelimitedResult = noduplicatesListDelimitedResult.substring(0, noduplicatesListDelimitedResult.length()-1);
            
      return noduplicatesListDelimitedResult;
}

Good - it would be better to append using a StringBuilder though