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
/**
	 * Called when the package field has changed.
	 * The method validates the package name and returns the status of the validation
	 * This also updates the package fragment model.
	 * Can be extended to add more validation
	 */
	protected IStatus packageChanged() {
		StatusInfo status= new StatusInfo();
		fPackageDialogField.enableButton(getPackageFragmentRoot() != null);
		
		String packName= getPackageText();
		if (packName.length() > 0) {
			IStatus val= JavaConventions.validatePackageName(packName);
			if (val.getSeverity() == IStatus.ERROR) {
				status.setError(NewWizardMessages.getFormattedString("TypePage.error.InvalidPackageName", val.getMessage())); 
				return status;
			} else if (val.getSeverity() == IStatus.WARNING) {
				status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.DiscouragedPackageName", val.getMessage())); 
				
			}
		}
		
		IPackageFragmentRoot root= getPackageFragmentRoot();
		if (root != null) {
			IPackageFragment pack= root.getPackageFragment(packName);
			try {
				IPath rootPath= root.getPath();
				IPath outputPath= root.getJavaProject().getOutputLocation();
				if (rootPath.isPrefixOf(outputPath) && !rootPath.equals(outputPath)) {