Intermediate

P/Sda1/Vaadin/Sudoku/src/main/java/de/hdm_stuttgart/mi/sudoku/ui/HelloUi.java

@@ -42,11 +42,13 @@ public class HelloUi  extends UI {
          @Override
          public String getStyle(Table source, Object itemId, Object propertyId) {
             int row = ((Integer)itemId).intValue();
-            if (2 == row % 3) {
-             return "sudokugroup";
-            } else {
-               return null;
+            if (null != propertyId) {
+                System.out.println(propertyId);
+                if (2 == row % 3) {
+                 return "sudokugroup";
+                } 
             }
+            return null;
          }
      });
       
@@ -64,6 +66,7 @@ public class HelloUi  extends UI {
 		final SudokuBoard board = new SudokuBoard();
 
 		for (int y = 0; y < SudokuBoard.size; y++) {
+			//table.addContainerProperty ("Sum",            Label.class,     null);
 			final AbstractComponent tf[] = new AbstractComponent[SudokuBoard.size];
 			for (int x = 0; x < SudokuBoard.size; x++) {
 				final TextField t = new TextField();

P/Sda1/Vaadin/Sudoku/src/main/resources/VAADIN/themes/sudoku/styles.css

-../../../../webapp/VAADIN/themes/sudoku/styles.css
\ No newline at end of file