WindowBuilder Design Tab incomplete in Eclipse
Solution 1:
This is a known and already fixed issue when running Eclipse with Java 16 or higher:
WindowBuilder issue #45 - Reflective access with CGLIB breaks windowbuilder in java 16 and higher
Update: The issue has been fixed. It is already available in the WindowBuilder Nightly Build (update site: https://download.eclipse.org/windowbuilder/lastgoodbuild/
) and will be available in the upcoming WindowBuilder 1.9.8 release.