Java Help: February 2020

Array Program 1: Find the Evenly Repeated number from an Array

Input: int[] a = {1,1,5,4,8,1,5,8,3,9,15,15,16,2,8,7,9,1};

Output : [1, 5, 9, 15]

package JavaPractice;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class ArraysEvenOccurance {

 public static void main(String arg[]){
     int[] input = {1, 1, 5, 4, 8, 1, 5, 8, 3, 9, 15, 15, 16, 2, 8, 7, 9, 1};
     int[] output = new int[input.length];
        // sort input array
        Arrays.sort(input);
        
        int counter = 1, k = 0, j=0;
        for (int i = 1; i < input.length; i++) {
            if (input[k] == input[i]) {
                // check for same number
                counter++;
            } else {
                // check even number of counter
                if (counter % 2 == 0) {
                    output[j] = (input[k]);
                    j++;
                }
                counter = 1;
                k = i;
            }
        }
        // Removing Extra appended element (sub array)
        output = Arrays.copyOfRange(output, 0, j);
        // Print Result array
        System.out.println(Arrays.toString(output));

}
}

Java Help

Saturday 1 February 2020

Array Program 1 : Find Evenly Repeated number from an Array