Syntax error How to count unique elements in the array using java?

How to count unique elements in the array using java?

The interface Set does not allow duplicate elements, therefore, create a set object and try to add each element to it using the add() method in case of repetition of elements this method returns false −

If you try to add all the elements of the array to a Set, it accepts only unique elements −

Example

import java.util.Arrays;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class CountingUniqueElements {
   public static void main(String args[]) {
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter the size of the array that is to be created ::");
      
      int size = sc.nextInt();
      int count = 0;
      int[] myArray = new int[size];
      
      System.out.println("Enter the elements of the array ::");

      for(int i = 0; i<size; i++) {
         myArray[i] = sc.nextInt();
      }
      System.out.println("The array created is :: "+Arrays.toString(myArray));
      System.out.println("indices of duplicate elements in the array are elements :: ");
      Set set = new HashSet();

      for(int i = 0; i<myArray.length; i++) {
         if(set.add(myArray[i])) {
            count++;
            System.out.println("Index :: "+i+" Element :: "+myArray[i]);
         }
      }
   }
}

Output

Enter the size of the array that is to be created ::
6
Enter the elements of the array ::
45
45
45
69
32
69
The array created is :: [45, 45, 45, 69, 32, 69]
indices of duplicate elements in the array are elements ::
Index :: 0 Element :: 45
Index :: 3 Element :: 69
Index :: 4 Element :: 32
Updated on: 2019-07-30T22:30:20+05:30

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