fix the errors in the following code

public class Test {

public static void main(String[] args) {

int[][] matrix = {1, 2, 3, 4, 5, 6};

System.out.println(m(matrix, 1));

}

public static int m(int matrix, int column) {

int sum = 0;

for (int i = 0; i < matrix.length; i++)

sum += matrix[i][column];

return sum;

}

}