Secret Santa Code in Java (https://en.wikipedia.org/wiki/Secret_Santa)

SecretSanta.java

import java.util.Arrays;
import java.util.Random;

/**
 * The Class SecretSanta.
 */
public class SecretSanta {

  /**
   * Generate assignments. preconditions : 
   * 1) in case of null input then return null.
   * 2) in case of array with length zero then return an empty string array. 
   * 3) in case of single element in the array return the same array. 
   * 4) else return array with random names against each name which is
   * not itself
   * 
   * @param names the names
   * @return the string[]
   */
  public String[] generateAssignments(String[] names) {
    // for string array name is null then return null
    if (names == null) return null;
    // for string array name length is zero then return an empty string array
    if (names.length == 0) return new String[0];
    // for single element in the array return the same array
    if (names.length == 1) return names;

    int nameslength = names.length;

    Boolean[] chosen = new Boolean[nameslength];
    Boolean[] santa = new Boolean[nameslength];
    
    // initialize arrays with false
    Arrays.fill(chosen, false);
    Arrays.fill(santa, false);

    Random rand = new Random();
    // final result array
    String[] result = new String[names.length];
    int position = 0;

    while (true) {
      int randomInt1 = rand.nextInt(nameslength);
      int randomInt2 = rand.nextInt(nameslength);

      // get random person
      String person1 = names[randomInt1];
      String person2 = names[randomInt2];

      if (person1 == person2) {
        // do nothing
      }
      // if two person name are not same
      if ((!person1.equals(person2)) && (santa[randomInt1] == false)
          && (chosen[randomInt2] == false)) {

        if (!person1.equals(names[position])) {
          result[position] = person1;
          position++;

          santa[randomInt1] = true;
          chosen[randomInt2] = true;

          if (isArrCompleted(santa) && isArrCompleted(chosen)) break;
        }

      }
    }
    return result;
  }

  /**
   * checks if the array execution is completed.
   * 
   * @param boolarray the arr
   * @return true, if successful
   */
  private boolean isArrCompleted(Boolean[] arr) {
    for (int i = 0; i < arr.length; i++) {
      if (arr[i] == false) {
        return false;
      }
    }
    return true;
  }


  /**
   * The main method.
   * 
   * @param args the arguments
   */
  public static void main(String[] args) {
    final String[] participants =
        new String[] {"Kyle", "Kenny", "Eric", "Stan", "Stewie",
            "Brian"};
    final String[] assignments =
        new SecretSanta().generateAssignments(participants);

    for (int i = 0; i < assignments.length; i++) {
      System.out.println(assignments[i]);
      if (assignments[i].equals(participants[i]))
        System.out.println("ERROR : " + assignments[i]);
    }
  }

}

This code leads to memory out of exception 3 out of 4 times, It works but not final version.

@vinot84 For what input did it produce memory out of bounds exception for you ?