You asked: Can I create a class inside a class in Java?

What is an inner class in Java?

Java inner class or nested class is a class that is declared inside the class or interface. 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.

Can you instantiate a class within itself Java?

so by line 1, class is both loaded and initialized and hence there is no problem in instantiating an instance of class in itself.

How do you create a classroom class in Java?

To create an object of Main , specify the class name, followed by the object name, and use the keyword new :

  1. Example. Create an object called ” myObj ” and print the value of x: public class Main { int x = 5; public static void main(String[] args) { Main myObj = new Main(); System. …
  2. Example. …
  3. Second.java.

Can inner class have constructor?

5 Answers. You can observe the constructor chain for the inner class when you extend an inner class. so you can see that you are able to call the super constructor of your nested class passing to that constructor the MainClass , and calling . super on mainClass object instance.

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Is overriding possible in Java?

In Java, methods are virtual by default. We can have multilevel method-overriding. Overriding vs Overloading : … Overriding is about same method, same signature but different classes connected through inheritance.

Can we override inner class?

No, you cannot override private methods in Java, private methods are non-virtual in Java and access differently than non-private one. Since method overriding can only be done on derived class and private methods are not accessible in a subclass, you just can not override them.

What are the types of inner classes?

There are four types of inner classes: member, static member, local, and anonymous.

  • A member class is defined at the top level of the class. …
  • A static member class is defined like a member class, but with the keyword static. …
  • A local inner class is defined within a method, and the usual scope rules apply to it.

Can you use a class within itself?

5 Answers. There is absolutely no problem in creating instances of a class in the class itself. The apparent chicken-or-egg problem is solved in different ways while the program is being compiled and when it is being run.

Can a class have its own object?

// A class cannot have non-static object(s) of self type. If a non-static object is member then declaration of class is incomplete and compiler has no way to find out size of the objects of the class. Static variables do not contribute to the size of objects.

Can I create an object inside a class?

In java you cannot create a method outside of a class. All methods must be encapsulated within a class. Therefore the main method as an entry point to the program must be within a class. When you run this program the main method will be run once and will execute the code inside it.

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