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

ScoreBoard.java

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 () {

ScoreIterator scoreiterator = new ScoreIterator() {

private int row = 0;

private int column = 0;

private int totalrows = scores.length;

private int totalcolumns = scores[0].length;

@Override

public int next() {

//check if we have next element

if (hasNext()) {

while (row < totalrows) {

while (column < totalcolumns) {

int num = scores[row][column];

column++;

if (column == totalcolumns) {

column = 0;

row++;

}

return num;

}

row++;

}

}

return 0;

}

@Override

public boolean hasNext() {

return row < totalrows && column < totalcolumns;

}

};

return 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());

}

}

}

ScoreIterator.java

public interface ScoreIterator {

int next();

boolean hasNext();

}