Java Nesting of classes

Nesting of class is process of writting one class into another class. sometimes it is necessary to group the classes logically.

Nesting of class increases the use of encapsulation in java to create more effective program.

Syntax

class FirstClass
{
	...
	...
	class SubFirstClass
	{
		...
		...
	}
}

Types of Nested Class

  1. Static Nested Class
  2. Inner Class
    • Local Classes
    • Anonymous Classes

1.Static Nested Class

The class which is created inside the class is static Nested class. It cannot access non-static members but outer class can access it.

Example

Printing the values of class using static Nested class

class StaticClassDemo
{
	static int  value = 50;
	static class InnerClass
	{
		void printValue()
		{
			System.out.println("Value is : "+value);
		}
	}
	public static void main(String args[])
	{
		StaticClassDemo.InnerClass inner = new StaticClassDemo.InnerClass();
		inner.printValue();
	}
}

Output

Value is : 50
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