start implementing read from .txt functionality

Main.java

@@ -0,0 +1,48 @@
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        char[][] matrix = readInputs();
+
+        for (char[] row : matrix) {
+            for (char c : row) {
+                System.out.print(c + " ");
+            }
+            System.out.println();
+        }
+    }
+
+    public static char[][] readInputs() {
+        char[][] matrix = new char[9][9]; // Initialize a 9x9 matrix
+        try {
+            File file = new File("./input.txt");
+            Scanner scanner = new Scanner(file);
+            
+            int row = 0;
+            while (scanner.hasNextLine() && row < 9) {
+                String line = scanner.nextLine();
+                if (line.length() != 9) {
+                    throw new IllegalArgumentException("Each line in the file must have exactly 9 characters.");
+                }
+                for (int col = 0; col < 9; col++) {
+                    matrix[row][col] = line.charAt(col);
+                }
+                row++;
+            }
+            
+            if (row != 9) {
+                throw new IllegalArgumentException("The file must contain exactly 9 lines.");
+            }
+            
+            scanner.close();
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found");
+        } catch (IllegalArgumentException e) {
+            System.out.println(e.getMessage());
+        }
+        
+        return matrix;
+    }
+}