FULL PRODUCT VERSION :
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)

A DESCRIPTION OF THE PROBLEM :
The 'orientation' property of JToolBar does not have an enum attribute specified in its BeanInfo, which means that it looks like an ordinary int-valued property instead of being restricted to HORIZONTAL and VERTICAL only.

  From the 1.5.0 source code, here is the beaninfo for the orientation property:
     * @beaninfo
     * description: The current orientation of the tool bar
     * bound: true
     * preferred: true


For comparison, here is the beaninfo from JSplitPane's orientation property, which does contain an enum attribute:
     * @beaninfo
     * bound: true
     * description: The orientation, or how the splitter is divided.
     * enum: HORIZONTAL_SPLIT JSplitPane.HORIZONTAL_SPLIT
     * VERTICAL_SPLIT JSplitPane.VERTICAL_SPLIT




REPRODUCIBILITY :
This bug can be reproduced always.