How To Find Sum Of Each Column

i want to write a program have a array 2d like that :

int array [][] = new int [3][3]

after that the user input value by using scanner then give summation of each column in matrix , i wrote this one

Java Code:

class MatrixSum{
public static void main(String[] args) {
int matrix1[][]= {{7,8,9},{1,5,2}};
int matrix2[][]= {{1,6,4},{2,7,3}};
System.out.println("Number of Row= " + matrix1.length);
System.out.println("Number of Column= " + matrix1[1].length);
int l = matrix1.length;
System.out.println("Matrix 1 : ");
for(int i = 0; i < l; i++) {

[code]...

but i want to change that the user input the value by using scanner.