ERROR: UIDefaults.getUI() failed: java.lang.NullPointerException
at javax.swing.UIDefaults.getUI(UIDefaults.java:339)
at javax.swing.UIManager.getUI(UIManager.java:222)
at javax.swing.JPanel.updateUI(JPanel.java:141)
at javax.swing.JPanel.<init>(JPanel.java:56)
at javax.swing.JPanel.<init>(JPanel.java:76)
at javax.swing.JRootPane.createGlassPane(JRootPane.java:278)
at javax.swing.JRootPane.<init>(JRootPane.java:78)
at javax.swing.JFrame.createRootPane(JFrame.java:175)
at javax.swing.JFrame.frameInit(JFrame.java:393)
at javax.swing.JFrame.<init>(JFrame.java:123)
at
net.sf.freecol.client.gui.FullScreenFrame.<init>(FullScreenFrame.java:34)
at net.sf.freecol.client.FreeColClient.startGUI(FreeColClient.java:218)
at net.sf.freecol.client.FreeColClient.access$000(FreeColClient.java:31)
at net.sf.freecol.client.FreeColClient$1.run(FreeColClient.java:142)
at java.awt.event.InvocationEvent.runAndNotify(InvocationEvent.java:98)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:78)
at java.awt.EventQueueCore.dispatchEventImpl(EventQueueCore.java:138)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:144)
at
java.awt.EventDispatchThread.runModalLoop(EventDispatchThread.java:74)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:48)
In the UI defaults class:
Method method = null;
if (uiClass == null) {
uiClass = getUIClass(classID,
comp.getClass().getClassLoader());
method = getCreateUIMethodPriveledged(uiClass);
put(fullClassName, uiClass);
put(uiClass, method);
} else {
method = (Method)get(uiClass); *<--- method is null, because
no value exists for the uiClass key*
}
return (ComponentUI)method.invoke(null, new Object[] { comp });
*<--- causes NPE when tryin to invoke*
What is supposed to return to the method variable? Does this return null
because the setUI() method is not called from within JRootPane?
--
Regards,
Tharindu
