Bug 73297 [quick fix] Open Build path dialog quick fix
A jar was removed and not replace with the newer one. Subsequently, I got the error "The project was not built since its build path is incomplete. Cannot find the class file for javax.activation.DataSource. Fix the build path then try building this project...". It is a minor thing, but for beginners quite helpful if upon double-click on this error, the project properties - Java Build Path would open in the "Libraries" tab.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/ReorgCorrectionsSubProcessor.java
private final IJavaProject fProject;
		private final boolean fChangeOnWorkspace;
		
		private Job fUpdateJob;
		private boolean f50JREFound;
		
		public ChangeTo50Compliance(String name, IJavaProject project, boolean changeOnWorkspace, int relevance) {
			super(name, null, relevance, JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE));
			fProject= project;
			fChangeOnWorkspace= changeOnWorkspace;
			fUpdateJob= null;
			f50JREFound= false;
		}