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

The solution to the above problem in java is as follows:-

Code-

import java.util.*;

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

    ScoreIterator scoreIterator () {
        // return anonymous object of type ScoreIterator
        ScoreIterator x= new ScoreIterator(){ //Create new object
            int i=0; //devclare player index
            int j=0; //Score index
            @Override
            public int next(){ //Calculate scores for the index
                int score=scores[i][j];
                j++;
                if(j==scores[i].length){
                    i++; ///increase iterator
                    j=0;
                }
                return score; //return total score
            }
            @Override
            public boolean hasNext(){ //Check if new player exists
                return i<scores.length;
            }
        };
        return x;
      
    }

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

Code Screenshots-

Outputs-

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