Java editor does not show folding indicators

1. Open a C++ file containing a function.
   Creator displays a small arrow next to the function. Using this, you can fold and unfold the function:
   
2. Open a Java file containing a function.
   You won't see any of these arrows. Folding and unfolding using the menu works though.

The Java editor should show the same arrows for folding and unfolding like the C++ editor.