JAVA IDEs for easily learning and understanding object oriented programming

Introduction to object-oriented programming (OOP) can be difficult for beginners in programming, especially if only pure code is used. To facilitate learning and understanding the concept of OOP many Java Integrated Development Environments (IDEs), that contains a lot of visual elements, are developed. Adding the visualization make programming easier, more interesting and interactive for users. These environments help to decrease the age of programming beginners. In this paper it will be given a brief overview of some of these environments. It will be done a comparison between them emphasizing differences among them, their advantages and disadvantages