In-depth understanding of Java Nested classes and internal classes

For Nested classes, see this article.

For more information about internal classes, see this article.

 

It is worth noting that

• Static internal classes cannot access external non-static members (restricted by the non-static member access conventions of Java static members)

• The internal class. Class file name format is as follows:

1. If it is a static nested class or an internal nested class, it is expressed as outerclass $ innerclass. Class.
2. If it is a nested class inside the method, it is in the form of outerclass $ 1innerclass. Class.
3. The anonymous internal class is in the format of outerclass $1. Class.