Java ClassesLesson 37Free preview

Java Inner Classes

This lesson is part of Java · All levels

Summary

An inner class is a class that is declared within another class so that the program structure feels more organized. Java knows several forms, from the member inner class, the static nested class, to the local class that is within the method. The inner class is most useful when a type only makes sense as part of its outer class.

Key points

Members of the inner class are written directly within the outer class body.
Static nested class can be created without the object of the class outside.
Local class is declared within the method and only applies within the scope of that method
Inner class easily accesses the field and method belonging to the outer class

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.