Question

Java Program

Write a method called “fillMatrix” that takes two integers rows and cols and returns a 2D array of integers of size rows x cols where the value of element [row][col] is row + col. Write a short program to test your method.

Answer 1

//TestCode.java
public class TestCode {
    public static int[][] fillMatrix(int rows, int cols){
        int[][] result = new int[rows][cols];
        for(int i = 0;i<rows;i++){
            for(int j = 0;j<cols;j++){
                result[i][j] = i+j;
            }
        }
        return result;
    }

    public static void main(String[] args) {
        int[][] result = fillMatrix(3,4);
        for(int i = 0;i<result.length;i++) {
            for(int j = 0;j<result[i].length;j++){
                System.out.print(result[i][j]+" ");
            }
            System.out.println();
        }
    }
}

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