Question

In java. I have class ScoreBoard that holds a 2d array of each player's score. COde Bellow

Example:

	Score 1	score 2
Player1	20	21
Player2	15	32
Player3	6	7

Using the method ScoreIterator so that it returns anonymous object of type ScoreIterator , iterate over all the scores, one by one. Use the next() and hasNext()

public interface ScoreIterator {
    int next();
    boolean hasNext();

Class ScoreBoard :

import java.util.*;

public class ScoreBoard {
    int[][] scores ;

    public ScoreBoard (int numOfPlayers, int numOfRounds) {
        scores = new int[numOfPlayers][numOfRounds];
        Random rand = new Random();
        for (int i = 0; i < numOfPlayers; i++) {
            for (int j = 0; j < numOfRounds; j++) {
                scores [i][j] = 50 + rand.nextInt(51);
            }
        }
    }

    public ScoreIterator scoreIterator () {
        // return anonymous object of type ScoreIterator 

        
    }

    public static void main(String[] args) {
        ScoreBoard sb = new ScoreBoard (3, 2);
        ScoreIterator iterator = sb.ScoreIterator ();
        while (iterator.hasNext()) {
            System.out.println(iterator.next());
        }
    }
}

}

Answer 1

Here is the updated class ScoreBoard.

=============================================================================

import java.util.*;

public class ScoreBoard {
    int[][] scores;
    int nextIndex = 0;

    public ScoreBoard(int numOfPlayers, int numOfRounds) {
        scores = new int[numOfPlayers][numOfRounds];
        Random rand = new Random();
        for (int i = 0; i < numOfPlayers; i++) {
            for (int j = 0; j < numOfRounds; j++) {
                scores[i][j] = 50 + rand.nextInt(51);
            }
        }
        nextIndex = 0;
    }

    public ScoreIterator ScoreIterator() {

        return new ScoreIterator() {
            @Override
            public int next() {

                int score = scores[nextIndex/scores[0].length][nextIndex%scores[0].length];
                nextIndex++;
                return score;
            }

            @Override
            public boolean hasNext() {
                return (nextIndex < scores.length * scores[0].length);

            }
        };
    }

    public static void main(String[] args) {
        ScoreBoard sb = new ScoreBoard(2, 3);
        ScoreIterator iterator = sb.ScoreIterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next());
        }
    }


}

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