Inheritance is one of the most influential concepts in object-oriented programming and has a direct impact on how you design and write Java classes. Inheritance is a very powerful mechanism. The concept of inheritance is that when you write a class, you only need to determine how this class is different from some other category. Inheritance will give you automatic access to the information contained in the original class. When you use inheritance, and all the categories you write, that level of other libraries you use, and those of the categories as well as the standard advantage, are organized in a strict way