Bug 9304 new class wizard: incorrect terminology used
1. new class wizard 2. press Add.. in interfaces 3. the dialog you see has a title 'Extended Interfaces Selection' this is incorrect - it should be 'Implemented Interfaces Selection' (this bug was pointed out on the wsad newsgroup)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/TypePage.java
status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.InterfaceNotExists", intfname)); 
						return status;
					} else {
						if (type.isClass()) {
							status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.InterfaceIsNotInterface", intfname)); 
							return status;
						}
						if (!JavaModelUtil.isVisible(type, getPackageFragment())) {
							status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.InterfaceIsNotVisible", intfname)); 
							return status;
						}
					}
				} catch (JavaModelException e) {
					JavaPlugin.log(e.getStatus());
					
				}					
			}				
		}
		return status;
	}
	/**
	 * Called when the modifiers have changed.
	 * The method validates the modifiers and returns the status of the validation.
	 * Can be extended to add more validation.
	 */
	protected IStatus modifiersChanged() {
		StatusInfo status= new StatusInfo();
		int modifiers= getModifiers();
		if (Flags.isFinal(modifiers) && Flags.isAbstract(modifiers)) {
			status.setError(NewWizardMessages.getString("TypePage.error.ModifiersFinalAndAbstract"));