Static Classes In Java

There is a static nested class, this [static nested] class does not need an instance of the enclosing class in order to be instantiated itself.

These classes [static nested ones] can access only the static members of the enclosing class [since it does not have any reference to instances of the enclosing class...]

code sample:

public class Test { 

  class A { } 

  static class B { }

  public static void main(String[] args) { 

    /will fail - compilation error, you need an instance of Test to instantiate A*/

    A a = new A(); 

    /*will compile successfully, not instance of Test is needed to instantiate B /

    B b = new B(); 

  }

}

4 years ago

Yes there is a static nested class in java. When you declare a nested class static, it automatically becomes a stand alone class which can be instantiated without having to instantiate the outer class it belongs to.

Example:

public class A

{



 public static class B

 {

 }

}

Because class B is declared static you can explicitly instantiate as:

B b = new B();

Note if class B wasn't declared static to make it stand alone, an instance object call would've looked like this:

A a= new A();

B b = a.new B();

4 years ago