Justfile

@@ -11,7 +11,7 @@ clean:
     fd -td -I build -x rm -r
 
 watch:
-    watchexec -r -c -w app/src "just test && just run" 
+    watchexec -c -w app/src "just test && just run" 
 
 watchdoc:
-    watchexec -r -c -w app/src "just doc"
+    watchexec -c -w app/src "just doc"

app/src/main/java/gui/SudokuController.java

@@ -26,13 +26,13 @@ public class SudokuController {
             public void actionPerformed(ActionEvent e) {
                 // Solve the board
                 boolean solved = model.solve();
-                // Update the view
-                view.updateView(model.getBoard());
                 if (!solved) {
                     view.showErrorMessage("Could not solve the board.");
                     System.out.println("Could not solve the board.");
                     System.out.println(model.toString());
                 } else {
+                    // Update the view
+                    view.updateView(model.getBoard());
                 }
 
             }
@@ -70,13 +70,6 @@ public class SudokuController {
                 if (newBoard != null) {
                     // Set the model
                     model.setBoard(newBoard);
-
-                    // Warn and clear if the board is not solvable
-                    if(!model.isSolvable()) {
-                        view.showErrorMessage("The board is not solvable.");
-                        model.clear();
-                    }
-
                     // Update the view
                     view.updateView(model.getBoard());
                 }
@@ -120,7 +113,7 @@ public class SudokuController {
             }
 
             // If the input is invalid, value < 0 indicates parse error
-            if (value != 0 && !model.isLegal(row, col, value) || value < 0) {
+            if (!model.isLegal(row, col, value) || value < 0) {
                 value = 0;
                 view.showErrorMessage("Invalid input. Try again.");
             }

app/src/main/java/sudoku/Solver.java

@@ -29,12 +29,7 @@ public class Solver implements SudokuSolver {
     /** Resets the board to all zeros */
     @Override
     public void clear() {
-        for (int[] row : board) {
+        board = new int[9][9];
-            for (int i = 0; i < row.length; ++i) {
-                row[i] = 0;
-            }
-        }
-        // board = new int[9][9];
     }
 
     /* {@inheritDoc} */
@@ -149,11 +144,6 @@ public class Solver implements SudokuSolver {
             return false;
         }
 
-        // Ihe the number is already present in the cell
-        if (board[row][col] == num) {
-            return true;
-        }
-
         // Check both the row and column
         for (int i = 0; i < 9; i++) {
             if (board[row][i] == num || board[i][col] == num) {