Bug 14421 Old .CLASS Files Are Not Deleted
When creating a project that does NOT use source folders (and does not use a bin directory for .class files) the .java and .class files are stored together in the Java package structure. When converting a project to use source folders (and the required bin directory for .class files), the old .class files stored in the Java package structure are NEVER DELETED by Eclipse. This is a bug for Eclipse 1.0 and 2.0. Since I use WSDD 4.0 (which is built on Eclipse 1.0), I've seen compilation errors due to the fact that the compiler/JDT is using old .class files rather than the new ones in the project's bin directory. I have not managed to reproduce the compile errors in build 20020416. But since the old .class files should have been deleted this is still a bug for the latest build.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/NewSourceFolderWizardPage.java
return (dialog.open() == EditClassPathDialog.OK);
	}
	
	private IContainer[] getFilteredExistingContainerEntries() {
		if (fCurrJProject == null) {
			return new IContainer[0];
		}
		List res= new ArrayList();
		try {
			IResource container= fWorkspaceRoot.findMember(fCurrJProject.getOutputLocation());
			if (container != null) {
				res.add(container);
			}
		} catch (JavaModelException e) {
			JavaPlugin.log(e);
		}	
		
		for (int i= 0; i < fEntries.length; i++) {
			IClasspathEntry elem= fEntries[i];
			if (elem.getEntryKind() == IClasspathEntry.CPE_SOURCE) {
				IResource container= fWorkspaceRoot.findMember(elem.getPath());
				if (container != null) {
					res.add(container);
				}
			}		
		}
		return (IContainer[]) res.toArray(new IContainer[res.size()]);
	}	
		
}