Bug 49353 Javadoc preference does not indicate bad exe until field is edited. [javadoc]
I upgarded from Sun Java 1.4.2_02 to 1.4.2_03. When I open the Javadoc preference page, the entry fields shows "C:\Java\sun\1.4.2_02\bin\javadoc.exe", which no longer exists but the error icon and message is NOT displayed at the top of the pane. If I edit the field but leave the entry still bogus, THEN the error icon and message appear. I think the error should appear as soon as the pane is displayed. Version 3.0.m6.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocTreeWizardPage.java
}
		}
		return (IPath[]) res.toArray(new IPath[res.size()]);
	}
	private IPath[] getClassPath(IJavaProject[] javaProjects) {
		HashSet res= new HashSet();
		for (int j= 0; j < javaProjects.length; j++) {
			IJavaProject curr= javaProjects[j];
			try {
				IPath p= curr.getProject().getLocation();
				if (p == null)
					continue;
				IPath outputLocation= p.append(curr.getOutputLocation());
				String[] classPath= JavaRuntime.computeDefaultRuntimeClassPath(curr);
				for (int i= 0; i < classPath.length; i++) {
					IPath path= new Path(classPath[i]);
					if (!outputLocation.equals(path)) {
						res.add(path);
					}
				}
			} catch (CoreException e) {
				JavaPlugin.log(e);
			}
		}
		return (IPath[]) res.toArray(new IPath[res.size()]);
	}
	/**
	 * Gets a list of elements to generated javadoc for from each project. 
	 * Javadoc can be generated for either a IPackageFragmentRoot or a ICompilationUnit.
	 */