Making Address and City as outer class exposes City to any of the Class . Making it an inner class of Address will make sure that its accessed using object of Address.
Read moreWhat is inner and outer class in Java?
Nested Classes In Java, just like methods, variables of a class too can have another class as its member. Writing a class within another is allowed in Java. The class written within is called the nested class, and the class that holds the inner class is called the outer class .
Read moreWhat is a POJO example?
POJO class is used to define the object entities. For example, we can create an Employee POJO class to define its objects. Below is an example of Java POJO class: Employee.
Read moreWhen should I use inner class in Java?
Use a non-static nested class (or inner class) if you require access to an enclosing instance’s non-public fields and methods . Use a static nested class if you don’t require this access.
Read moreWhat are the POJO classes?
POJO classes It is an ordinary Java object , not bound by any special restriction other than those forced by the Java Language Specification and not requiring any classpath. POJOs are used for increasing the readability and re-usability of a program.
Read moreWhat is the main use of inner classes?
We use inner classes to logically group classes and interfaces in one place to be more readable and maintainable . Additionally, it can access all the members of the outer class, including private data members and methods.
Read moreWhy do we need inner class in Java?
Inner classes are a security mechanism in Java . We know a class cannot be associated with the access modifier private, but if we have the class as a member of other class, then the inner class can be made private. And this is also used to access the private members of a class.8 Oca 2018
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