JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS
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Java Nested (Inner) Classes Examples

  • If a class is declared within another class or interface is called nested class.
  • Types of nested classes are as given below:
  • Static Member Classes: It is defined as static member in a class or an interface.
  • Non-static Member Classes: It is defined as instance members of another classes.
  • Local Classes: It is defined in a block, like inside a method body or a local block.
  • Anonymous Classes: It can be defined as expressions and instantiated on the fly.

Java Nested Classes Sample Code Examples

  1. How to initialise or call a static member class?
  2. How to implement a static member interface?
  3. How to access top level class variables from static member classes?
  4. Give an example of basic non-static member class.
  5. How to initialise non-static member (local class) class?
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What is abstract class or abstract method?
We cannot create instance for an abstract class. We can able to create instance for its subclass only. By specifying abstract keyword just before class, we can make a class as abstract class.

public abstract class MyAbstractClass{

}

Abstract class may or may not contains abstract methods. Abstract method is just method signature, it does not containes any implementation. Its subclass must provide implementation for abstract methods. Abstract methods are looks like as given below:

public abstract int getLength();
Famous Quotations
Insanity: doing the same thing over and over again and expecting different results.
-- Albert Einstein
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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