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
IResource res= fWorkspaceRoot.findMember(new Path(fRootDialogField.getText()));
		if (res != null) {
			dialog.setInitialSelection(res);
		}
		if (dialog.open() == dialog.OK) {
			return (IFolder) dialog.getFirstResult();
		}			
		return null;		
	}
	private IJavaProject chooseProject() {
		IJavaProject[] projects;
		try {
			projects= JavaCore.create(fWorkspaceRoot).getJavaProjects();
		} catch (JavaModelException e) {
			JavaPlugin.log(e);
			projects= new IJavaProject[0];
		}
		
		ILabelProvider labelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT);
		ElementListSelectionDialog dialog= new ElementListSelectionDialog(getShell(), labelProvider);
		dialog.setTitle(NewWizardMessages.getString("NewSourceFolderWizardPage.ChooseProjectDialog.title")); 
		dialog.setMessage(NewWizardMessages.getString("NewSourceFolderWizardPage.ChooseProjectDialog.description")); 
		dialog.setElements(projects);
		dialog.setInitialSelections(new Object[] { fCurrJProject });
		if (dialog.open() == dialog.OK) {			
			return (IJavaProject) dialog.getFirstResult();
		}			
		return null;		
	}