Hi, I was playing around with the pre-release JDK 1.2 and it seems very
well done. However, I had a few problems and was wondering whether
others had similar problems (I looked at the bug report and none of
these were on there). I haven't looked too deeply into these problems
yet (but will soon and send a formal bug report to blackdown with some
sample code). This app has been tested using Sun's JDK 1.2 on Windows
NT40.
1. I use Exceed 6.0.1.0 (an NT X Client) to test my java app on Linux.
However, when I start my java app, a JFrame pops up, but then hangs the
entire X client. It looks like an Exceed problem at first, but then
again this NEVER happens with other X applications on Exceed. The app
loads normally if I am running X locally on the the machine. I was
wondering whether other people have similar problems with other
platforms / XClients.
2. Drag and Drop seems to be a problem. I get exceptions thrown when I
start dragging:
Exception occurred during event dispatching:
java.awt.dnd.InvalidDnDOperationException: The operation requested
cannot be performed by the DnD system since it is not in the appropriate
state
at sun.awt.motif.MDragSourceContextPeer.startDrag(Compiled Code)
at java.awt.dnd.DragSource.startDrag(Compiled Code)
at java.awt.dnd.DragSource.startDrag(Compiled Code)
at java.awt.dnd.DragGestureEvent.startDrag(Compiled Code)
at
com.ensim.utils.dnd.CTransferableIcon.dragGestureRecognized(Compiled
Code)
at
java.awt.dnd.DragGestureRecognizer.fireDragGestureRecognized(Compiled
Code)
at
sun.awt.motif.MMouseDragGestureRecognizer.mouseDragged(Compiled
Code)
at java.awt.AWTEventMulticaster.mouseDragged(Compiled Code)
at java.awt.Component.processMouseMotionEvent(Compiled Code)
at javax.swing.JComponent.processMouseMotionEvent(Compiled Code)
at java.awt.Component.processEvent(Compiled Code)
at java.awt.Container.processEvent(Compiled Code)
at java.awt.Component.dispatchEventImpl(Compiled Code)
at java.awt.Container.dispatchEventImpl(Compiled Code)
at java.awt.Component.dispatchEvent(Compiled Code)
at java.awt.LightweightDispatcher.retargetMouseEvent(Compiled
Code)
at java.awt.LightweightDispatcher.processMouseEvent(Compiled
Code)
at java.awt.LightweightDispatcher.dispatchEvent(Compiled Code)
at java.awt.Container.dispatchEventImpl(Compiled Code)
at java.awt.Window.dispatchEventImpl(Compiled Code)
at java.awt.Component.dispatchEvent(Compiled Code)
at java.awt.EventQueue.dispatchEvent(Compiled Code)
at java.awt.EventDispatchThread.run(Compiled Code)
I forgot to turn off the JIT when running. If anyone needs the stack
trace with the line numbers, email me, and I can regenerate the
exception.
3. I tried to "stress" test my application by clicking and dragging
randomly, and after quite a while, some code within X segfaults (looks
like a call from JNI) JDK1.2 then throws a Monitor Dump. This is hard to
narrow down because it doesn't seem to be a deterministic error. This
could possibly be an X problem, too. The version of X we are using is
the one shipped with RH 5.2 (X version 3.3.3.1)
Sorry if this email is a little vague and does not really help the
blackdown team much, but I am just trying to see whether others had the
same / similar problems so that I know that it isn't a problem with my
code / environment.
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