Forums Register Login

Unable to understand how to remove exception raised here.

+Pie Number of slices to send: Send
Below is the code for my ChatManager Class.


I wrote a FChatManager - for Facebook Chat as below:


Further I have ChatBuddy class that represents User/Buddy available for chat ... I get it when I receive Presence packet .


What I wanted to do is add/remove users, along with their images (which I could get from vCard) from a List in the ChatManager as and when they become available/unavailable. The problem is, I keep getting following...


Class of value: class javax.swing.plaf.basic.BasicPanelUI
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.plaf.basic.BasicPanelUI cannot be cast to ui.ChatBuddy
at ui.ChatManager$BuddyRenderer.getListCellRendererComponent(ChatManager.java:84)
at javax.swing.plaf.basic.BasicListUI.updateLayoutState(BasicListUI.java:1344)
at javax.swing.plaf.basic.BasicListUI.maybeUpdateLayoutState(BasicListUI.java:1294)
at javax.swing.plaf.basic.BasicListUI.getPreferredSize(BasicListUI.java:561)
at javax.swing.JComponent.getPreferredSize(JComponent.java:1634)
at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:769)
at java.awt.Container.layout(Container.java:1421)
at java.awt.Container.doLayout(Container.java:1410)
at java.awt.Container.validateTree(Container.java:1507)
at java.awt.Container.validate(Container.java:1480)
at javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:669)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:124)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122).......


What I don't get is I am adding a ChatBuddy at Line Number 60 in FChatManager to the List.. via ChatManager's addBuddy(ChatBuddy buddy) at Line No. 60 in ChatManager but javax.swing.plaf.basic.BasicPanelUI is what it gets... which is all the reason I think its failing. How could I get rid of this?? I don't have in depth knowledge of Java
Please I need help... after so long I have zeroed to using JList to display users online and also wrote a Simple Program and adding some custom Object to List.. there it said that the object received was the one that I had added.
Thanks.
1
+Pie Number of slices to send: Send
wild guess



maybe it should be
chatListModel.addElement(buddy);
+Pie Number of slices to send: Send
Thanks, Dunn. It was a silly mistake.
Just one more thing? Do you think, my design is kind of Okay?? Like doing most of the thing is an abstract class (Chat Manager)... and doing only Specific Things .. like related to Facebook in FChatManager which extends ChatManager??
Thanks a LOT.
When people don’t understand what you are doing they call you crazy. But this tiny ad just doesn't care:
a bit of art, as a gift, that will fit in a stocking
https://gardener-gift.com


reply
reply
This thread has been viewed 1428 times.
Similar Threads
Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError:
Compilation problem Java function in Oracle
Jtable and database results
show image on button click
JToolBar icons not seen
More...

All times above are in ranch (not your local) time.
The current ranch time is
Mar 28, 2024 02:06:24.