Added checkWin method

src/main/java/com/example/tictactoeswtha2/Controller.java

@@ -52,8 +52,37 @@ public class Controller {
             turnSign  = 'X';
             turnLabel.setText("X's turn");
         }
+
+        checkWin();
+    }
+
+
+    private void checkWin() {
+        if ((turnSign == 'X') && (
+                (l00.getText().length() > 0 && l01.getText().length() > 0 && l02.getText().length() > 0 && l00.getText().charAt(0) == l01.getText().charAt(0) && l01.getText().charAt(0) == l02.getText().charAt(0)) ||
+                (l10.getText().length() > 0 && l11.getText().length() > 0 && l12.getText().length() > 0 && l10.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l12.getText().charAt(0)) ||
+                (l20.getText().length() > 0 && l21.getText().length() > 0 && l22.getText().length() > 0 && l20.getText().charAt(0) == l21.getText().charAt(0) && l21.getText().charAt(0) == l22.getText().charAt(0)) ||
+                (l00.getText().length() > 0 && l10.getText().length() > 0 && l20.getText().length() > 0 && l00.getText().charAt(0) == l10.getText().charAt(0) && l10.getText().charAt(0) == l20.getText().charAt(0)) ||
+                (l01.getText().length() > 0 && l11.getText().length() > 0 && l21.getText().length() > 0 && l01.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l21.getText().charAt(0)) ||
+                (l02.getText().length() > 0 && l12.getText().length() > 0 && l22.getText().length() > 0 && l02.getText().charAt(0) == l12.getText().charAt(0) && l12.getText().charAt(0) == l22.getText().charAt(0)) ||
+                (l00.getText().length() > 0 && l11.getText().length() > 0 && l22.getText().length() > 0 && l00.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l22.getText().charAt(0)) ||
+                (l20.getText().length() > 0 && l11.getText().length() > 0 && l02.getText().length() > 0 && l02.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l20.getText().charAt(0))))
+            turnLabel.setText("O won");
+        if ((turnSign == 'O') && (
+                (l00.getText().length() > 0 && l01.getText().length() > 0 && l02.getText().length() > 0 && l00.getText().charAt(0) == l01.getText().charAt(0) && l01.getText().charAt(0) == l02.getText().charAt(0)) ||
+                (l10.getText().length() > 0 && l11.getText().length() > 0 && l12.getText().length() > 0 && l10.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l12.getText().charAt(0)) ||
+                (l20.getText().length() > 0 && l21.getText().length() > 0 && l22.getText().length() > 0 && l20.getText().charAt(0) == l21.getText().charAt(0) && l21.getText().charAt(0) == l22.getText().charAt(0)) ||
+                (l00.getText().length() > 0 && l10.getText().length() > 0 && l20.getText().length() > 0 && l00.getText().charAt(0) == l10.getText().charAt(0) && l10.getText().charAt(0) == l20.getText().charAt(0)) ||
+                (l01.getText().length() > 0 && l11.getText().length() > 0 && l21.getText().length() > 0 && l01.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l21.getText().charAt(0)) ||
+                (l02.getText().length() > 0 && l12.getText().length() > 0 && l22.getText().length() > 0 && l02.getText().charAt(0) == l12.getText().charAt(0) && l12.getText().charAt(0) == l22.getText().charAt(0)) ||
+                (l00.getText().length() > 0 && l11.getText().length() > 0 && l22.getText().length() > 0 && l00.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l22.getText().charAt(0)) ||
+                (l20.getText().length() > 0 && l11.getText().length() > 0 && l02.getText().length() > 0 && l02.getText().charAt(0) == l11.getText().charAt(0) && l11.getText().charAt(0) == l20.getText().charAt(0))))
+            turnLabel.setText("X won");
     }
 
+
+
+
     /**
      * Makes the button disappear, displays the sign and calls click to check the game state and change the sign
      * show the label
@@ -64,6 +93,7 @@ public class Controller {
         l00.setText("" + turnSign);
         b00.setVisible(false);
         click(row, column);
+
     }
     /**
      * Makes the button disappear, displays the sign and calls click to check the game state and change the sign