Does Java allow nested methods?

Java does not allow nested methods, which means that you cannot define a method within another method's body. In Java, a method must be defined at the class level, which is outside of other methods. This design decision helps maintain clarity in the structure of the code and keeps the visibility and lifecycle of methods clear and defined.

While inner classes can be defined within methods and can contain their own methods, those inner methods are not the same as nested methods since they belong to the inner class, not the enclosing method. This separation underscores the language's emphasis on encapsulation and proper object-oriented design principles.

By not allowing nested methods, Java enforces a more structured approach to method organization, which contributes to better readability and maintainability of the code. This design choice is consistent across all versions of Java, stressing that the organizational rules of the language remain stable.