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
}
		IStatus val= JavaConventions.validateJavaTypeName(sclassName);
		if (!val.isOK()) {
			status.setError(NewWizardMessages.getString("TypePage.error.InvalidSuperClassName")); 
			return status;
		}
		
		if (root != null) {
			try {		
				IType type= resolveSuperTypeName(root.getJavaProject(), sclassName);
				if (type == null) {
					status.setWarning(NewWizardMessages.getString("TypePage.warning.SuperClassNotExists")); 
					return status;
				} else {
					if (type.isInterface()) {
						status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.SuperClassIsNotClass", sclassName)); 
						return status;
					}
					int flags= type.getFlags();
					if (Flags.isFinal(flags)) {
						status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.SuperClassIsFinal", sclassName)); 
						return status;
					} else if (!JavaModelUtil.isVisible(type, getPackageFragment())) {
						status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.SuperClassIsNotVisible", sclassName)); 
						return status;
					}
				}
				fSuperClass= type;
			} catch (JavaModelException e) {
				status.setError(NewWizardMessages.getString("TypePage.error.InvalidSuperClassName"));