Remove duplicates in a String -- perform in-place replacement

public class RemoveDuplicateCharsInString {

     public static void main (String[] args)

     {

          char[] input1 ="aabbcccdddd".toCharArray();

          char[] input2 ="abbcddaabbcc".toCharArray();

         

          removeDuplicateCharsInString(input1);

          removeDuplicateCharsInString(input2);

         

          System.out.println(input1);

          System.out.println(input2);

     }

     public static void removeDuplicateCharsInString(char[] inputArray)

     {

          if(inputArray == null)

               return;

         

          if(inputArray.length < 2)

               return;

          int originalArrayLength = inputArray.length;

         

          //assumed that we leave the first item in array as is.

          int newDuplicateRemovedArrayTail = 1;

         

          for(int i=1; i < inputArray.length; i++)

          {

               int j = 0;

               for(; j< newDuplicateRemovedArrayTail; j++)

               {

                     if( inputArray[j] == inputArray[i])

                     {

                          // the current char is exists in the new non-duplicate array. so Skip it

                          break;

                     }

               }

               if(j == newDuplicateRemovedArrayTail )

               {

                     //means the above search found no matching in the non-duplicate array.

                     inputArray[newDuplicateRemovedArrayTail++]= inputArray[i];        

               }

          }

          for(int k = newDuplicateRemovedArrayTail ; k < originalArrayLength; k++)

          {   

               //nullify remianing chars.

               inputArray[k]=0;

          }

     }

    

}