Java is unusual for an oop’s language in that it is “objects all the way down”. Unlike C,C++, which is a confusing combination of objects and functions, everything in java is an object. Strings are objects, numbers are objects, threads are objects, even applets are objects. Because of this, java has all the helpful features of object-oriented systems just described. It’s core constructs of classes, objects, methods, and instance variables are, by there very nature, managed in a modular fashion. Java’s support for inheritance allows you to build new classes from other classes. Each class you construct becomes a tool that can be used to create yet more complex classes.

                                                                               It has runtime garbage collector that removes objects from memory that you no longer need. No longer will your program run out of memory because you forget to explicitly delete an object. The garbage collector, which your program doesn’t even have to be aware of, does this for you. Furthermore, java’s total orientation toward objects removes another construct that has been a blight of programmers-the pointer. Because of this combination of garbage collection and removal of the pointer construct, java has generally taken the problem of memory management away from you.