char matrix

package multidimencionalArrays;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class P04_TwoByTwoSquaresInMatrix {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String[] dim = reader.readLine().split("\\s+");

        int rows = Integer.parseInt(dim[0]);
        int cols = Integer.parseInt(dim[1]);

        char[][] matrix = new char[rows][cols];

        for (int row = 0; row < rows; row++) {
            char[] values = reader.readLine().toCharArray();
            for (int col = 0; col < cols; col++) {
                if (row != ' ' && col != ' ') {
                    matrix[row][col] = values[col];
                }
            }
        }
    }
}