How do I modify this to let the user input the size of the matrix? The lowest size is 4 and the largest size is 16.

import java.util.*;

public class Test1

{

public static void main(String[] args)

{

int[][] matrix = new int[4][4]; // create 4 by 4 matrix (need user input???)

// generate 1's and 0's for each each rows and columns

// and track largest row index with the most ones

int largestRI = 0;

int largest = -1;

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

{

int rowCount = 0;

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

{

matrix[i][k] = (int)(Math.random() * 2);

rowCount += matrix[i][k];

}

if (rowCount > largest)

{

largestRI = i;

largest = rowCount;

}

}

// find largest column index

int largestCI = 0;

largest = -1;

for (int k = 0; k < matrix[0].length; k++)

{

int columnCount = 0;

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

{

columnCount += matrix[i][k];

}

if (columnCount > largest)

{

largest = columnCount;

largestCI = k;

}

}

// display matrix

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

{

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

{

System.out.printf("%d", matrix[i][k]);

}

System.out.printf(" ");

}

System.out.println("The largest row index: " + largestRI);

System.out.println("The largest column index: " + largestCI);

}

}