How teach good object-oriented programming? This is a permanent question of a teacher who teaches OOP. Student motivation and goal of teaching is very important, for each teaching so also as in teaching OOP. Currently, there are very appropriate methodologies and software tools of development software respectively environments of development software for learning OOP. These methodologies are based on teaching the Java programming language. Article discusses of the teaching OOP through the finished sample applications and sample application of game. Teaching is based on established examples of simple games that students gradually develop or change. Students can create at the end of teaching his own application or game animation. Examples of games and animations are created in a familiar environment designed to teach OOP in Java: BlueJ and Greenfoot.