Problem in viewing ui.xml in designer mode.

[Neorj]

Hi,
I am new to GWT and uiBinder concept.
While trying out examples on eclipse Galileo. I stumbled upon the
following error below.
I started my eclipse using jdk1.6.0.
I am using Mac OS X Ver 10.5.8.
Any assistance would be of great help.

Regards
RJ

Internal Error

GWT Designer encountered unexpected internal error.

This could be caused by a GWT Designer bug or by a misconfiguration
issue, conflict, partial update, etc.

java.lang.UnsupportedClassVersionError: Bad version number in .class
file

Hide stack trace.
Stack trace:

java.lang.UnsupportedClassVersionError: Bad version number in .class
file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:676)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:
124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:317)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.loadImpl(HostedModeSupport.java:
111)
at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.<init>(HostedModeSupport.java:
84)
at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupportFactory.create(HostedModeSupportFactory.java:
33)
at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.getHostedModeSupport(GwtState.java:
939)
at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize0(GwtState.java:
228)
at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize(GwtState.java:
204)
at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createGWTState(UiBinderContext.java:
434)
at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createProjectClassLoader(UiBinderContext.java:
295)
at
org.eclipse.wb.internal.core.xml.model.EditorContext.createClassLoader(EditorContext.java:
146)
at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createClassLoader(UiBinderContext.java:
252)

[Eric Clayberg (Google)]

You have a JDK version mismatch between the JDK you are using to run Eclipse and the one you are using to compile your code. Make sure you are running Eclipse with the latest JDK.