public class FindDuplicates2 {
  public static void main(String args[]) {
    int intArray[] = { 1, 2, 3, 4, 1 };
    findDuplicates(intArray);
  }

  public static void findDuplicates(int[] id) {
    System.out.println("Duplicate data: ");
    int count[] = new int[10];

    for (int i = 0; i < id.length; i++) {
      count[id[i]]++;
      if (count[id[i]] == 2) {
        System.out.println(id[i] + " ");
      }
    }

    System.out.println();

  }
}