How to pull distinct values from an array in java?

Java 8 Object Oriented Programming Programming

To pull distinct values in an array you need to compare each element of the array to all the remaining elements, in case of a match you got your duplicate element. One solution to do so you need to use two loops (nested) where the inner loop starts with i+1 (where i is the variable of outer loop) to avoid repetitions in comparison.

Example

Live Demo

import java.util.Arrays;
import java.util.Scanner;

public class DetectDuplcate {
   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[] 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 the duplicate elements :: ");
 
      for(int i=0; i<myArray.length; i++) {
         for (int j=i+1; j<myArray.length; j++) {
            if(myArray[i] == myArray[j]) {
               System.out.println(j);
            }
         }
      }
   }
}

Output

Enter the size of the array that is to be created ::
6
Enter the elements of the array ::
87
52
87
63
41
63
The array created is :: [87, 52, 87, 63, 41, 63] indices of the duplicate elements ::
2
5

Sharon Christine

Published on 09-Jan-2018 05:21:56

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