how to compare elements in a string array in java?

Question

I am trying to find duplicate words in a string array.

Here is my code for the comparison:

   for ( int j = 0 ; j < wordCount ; j++)
   {    
             


        

Answer 1

You can do like this for beter performance:

public int getDuplicateCount(Integer[] arr){
     int count = 0;   
     Set set = new HashSet();
     for (int i = 0; i < arr.length; i++) {
         if (set.contains(arr[i]))
             count++;
         set.add(arr[i]);
      }
      return count;
 }