Java Learning Note Two

1. Java variables: class variables (static adornments), member variables, local variables, Java no global variables
2. Create object: A. Declaring variables, B. instantiating objects, c. Initializing variables
3. Java access modifier: public: All visible, Protected: Class of the same package and its subclasses (not visible in the same package) visible; private: same class visible; default is uniform package visible
4. The access modifier for the class has public, the default package is visible, the modifier is final, abstract;
5. The access modifier for the method has public, private, protected, modifier has static, final
6. The access modifier for a variable has public, private, protected, modifier has final, static, abstract, synchronized
7. Ordinary classes are not static modified, static can only decorate the inner class
8. Method overloading: Multiple methods in the same class have the same name, the parameter list is different, the parameter list contains the number of parameters, order, type at least one of the different, is declared final, static method cannot be overloaded;

Java Learning Note Two