The basic features of Java object-oriented

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The basic idea of 1,java design is to use class, object, inheritance, encapsulation, message and so on to program programming;

2,class defining =field (state data) +method (behavior)

3, object-oriented three basic features, encapsulation (encapsulation), Inheritance (inheritance), polymorphism (polymorphism);

(1) encapsulation, refers to the object will realize the details of hiding, through the behavior method to expose the function of the object;

(2) Inheritance means that subclasses can obtain the behavior and methods of the parent class by inheriting, in order to realize the reuse of the class;

(3) polymorphic, the same type of object in the execution of the same method, may show a variety of behavioral characteristics;

4, in Java design, in addition to 8 basic data types, everything is an object;

5, the materialization of the class is the object, the abstraction of the object is the class;

The basic features of Java object-oriented