Java Interview Program Example(s)


This blog contains information related to interview coding problems implemented using Java programming language. Please find the examples below –

This program helps to find the Duplicate records from a given Integer Array.

import java.util.*;

 * This class helps to find Duplicate records from a given Integer Array.
public class KWDuplicateNumOnArray {

   * This method helps to find duplicate records in an Integer Array.
  public static void findDuplicateFromArray(Integer[] intArray) {
    System.out.println("Executing findDuplicateFromArray Method");

    Set<Integer> set = new HashSet<Integer>();
    System.out.print("Duplicate Number is ::");
    for (Integer num : intArray) {

      if (!set.contains(num)) {

      } else {
        System.out.print(num + " , ");
    System.out.println("Completed findDuplicateFromArray Method");



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