Java Internal classes

Inner Class (inner Class): A class defined inside a class is called an inner class or built-in class.

1, the inner class is controlled by the external class to control the visibility of the inner class;

2. Through this reference, the inner class object can freely access all members of the outer class.

3. The class containing the inner class becomes the outer Class (outer Class).

4, the external class can only be public and the default access level, and the member class can be in Public,protected,privarte and the default of these four access levels.

Anonymous Class is a special class that does not have a name.

Test Class (Customer Class): outer the Access class and its inner class

Instance Inner class

One of the members inner classes, with no static adornments

　　　　

Java Internal classes