Implements vs. extends

- [Instructor] Here I have four classes; … a super class, country, and sub-classes, Brazil and Ireland. … Brazil and Ireland both override the dance method … that they've inherited from country. … I want to touch on a few of the … finer points of this relationship. … First, there's a word, final that you can use … if you had a class that you never wanted to be extended. … When I put final in here in country, … you'll see that Ireland and Brazil are not happy now. … What final means is that it can never be extended. … And that can be choice you can make. … Another thing, is that children … of a parent can also share data. … (instructor types) … I've declared a member variable inside of country. … And I can use that … (instructor types) … in the children. … (instructor types) … That works as long as we use a … default access modifier, which is nothing. … We also have special access modifier just for children; … which is called protected. … That still works. … If I change it to private, …