#Java reflection nested field code

This is the getValue method of the inner class: JavaOuterClass.JavaInnerClass inner = outer.new JavaInnerClass() JavaOuterClass outer = new JavaOuterClass() ('This is the getValue method of the inner class:') We can use any access modifier for the nested inner class – public, private, protected, or default.Ĭode to understand Nested Inner Class: package Nested Inner class is an inner class that can access other instance variables of the outer class, even if they are declared as private. We will discuss each of them in detail along with their syntax and code: 1. Here, the class OuterClassDemo is the outer class or the top-level class and the class InnerClassDemo is the nested or inner class.

#Java reflection nested field code

Placing inner classes within the top-level classes helps to put the code closer to where it is going to be used.įollowing is the syntax to write an inner class or nested class. It helps to increase the readability and maintainability of the code:.Eventually, this will lead to strong encapsulation and security. By nesting class C2 within the class C1, members of C1 can be declared as private, and C2 can access them.Īlso, we can protect C2 from the outside world. Suppose there are two top-level or outer classes, named C1 and C2, where class C2 needs to access the private members of the class C1. It helps to increase the encapsulation:.It will help their package to be more streamlined. Suppose there is a class that is useful only to a single class, then we can logically embed it in that class and keep the two classes together. It helps in the logical grouping of classes that belong together:.Now, you might be thinking about why to use an inner class rather than using separate classes? The following points will help you understand the purpose of using inner class along with its importance:

A top-level class may contain any number of inner classes.

Such class, which has other classes as its members is called a top-level class or outer class. In other words, the inner class is a member of a class just as a class has a member as variables and methods it can also have another class as its member. Keeping you updated with latest technology trends, Join TechVidvan on Telegram Java Inner ClassĪ class within another class is called a nested class or an inner class.