Why doesn't add method accept my inputs?

Question

So far this is my problematic code, assume everything else is made and done:

public GameRecord[] updateHighScoreRecords(GameRecord[] highScoreRecords, String name, int level, int score) {
    // write your code after this line

    int i = 0;
    for (GameRecord gr : highScoreRecords){
        if (gr.getScore() >= gr.getScore()){
            highScoreRecords.add(i+(gr.getLevel()-level),(Object) new GameRecord(name, level, score)); /*
            *adds the new GameRecord in at the (i+gr's level - level)th iteration.
            *note it does this because of the assumtion that highScoreRecords is ordered becuase of only using this function
            */
           break; //no more need to continue the loop
        }


        i += 1;
    }
    return highScoreRecords;
}

as you may have noticed, my code is part of a course, so that is why I'm assuming all other implementations are perfect.

Answer 1

You are passing in a GameRecord[] highScoreRecords array,

but calling a List method add - this does not exist on an Array . You should be getting a compile error.

If you are sure that the array has capacity for insertion then you could do

highScoreRecords[i+(gr.getLevel()-level)] = new GameRecord(name, level, score);

but I guess you would be better off using a List like ArrayList , and keeping your existing code. For this you will to pass a List to the method not an Array.

Answer 2

Java arrays are not dynamic data structures,

highScoreRecords.add(i+(gr.getLevel()-level),
    (Object) new GameRecord(name, level, score));

I think you wanted

// Using a List.
GameRecord[] updateHighScoreRecords(List<GameRecord> highScoreRecords, 
    String name, int level, int score) {

Also, don't cast to Object . That's raw-type ing.