Big Data-java Foundation -3day

1. Object-oriented features: encapsulation, inheritance, polymorphism.

2. Object-independent properties are generally defined as static (static)

3. The constructor name must have the same name as the class, and there is no return value, you can have parameters.

4. Member variables are also in the heap area.

5. Anonymous classes are classes that do not receive a variable. How does an anonymous class reference in memory?

6.this is a keyword that points inside a pointer to itself. When the variable name and member variable name are the same, use this. member variable name to represent the member variable.

Big Data-java Foundation -3day