Java > AP-1 > scoreUp (CodingBat Solution)

Problem:

The "key" array is an array containing the correct answers to an exam, like {"a", "a", "b", "b"}. the "answers" array contains a student's answers, with "?" representing a question left blank. The two arrays are not empty and are the same length. Return the score for this array of answers, giving +4 for each correct answer, -1 for each incorrect answer, and +0 for each blank answer.

scoreUp({"a", "a", "b", "b"}, {"a", "c", "b", "c"}) → 6
scoreUp({"a", "a", "b", "b"}, {"a", "a", "b", "c"}) → 11
scoreUp({"a", "a", "b", "b"}, {"a", "a", "b", "b"}) → 16

Solution:

public int scoreUp(String[] key, String[] answers) {
  int score = 0;
  for (int i = 0; i < key.length; i++) {
    if (key[i] == answers[i])
      score += 4;
    else if (answers[i] != "?" && answers[i] != key[i])
      score--;
  }
  return score;
}