How to sum a row in a matrix

Question

Write the method:

public int sumRow(int[][] matrix, int row)

that sums row row in the 2D array called matrix.

Given:

Answer 1

public int sumRow(int[][] matrix, int row)
{
    int sum = 0;

    int colSize = matrix[row].length;


    for(int j = 0; j < colSize; j++){
        sum += matrix[row][j];
    }   

    return sum;
}

HINT

Length of row:

int row = matrix.length;

Length of column :

int col = matrix[0].length;