Static Class with an example

      To declare a Static class we need to have nested class, one single class cannot be declared static. To understand this let’s go through with the Top-level class or Outer Class and inner class.

Here we go…

Top-level classes:-

You declare a top-level class at the top level as a member of a package. Each top-level class corresponds to its own java file sporting the same name as the class name.

A top-level class is by definition already top-level, so there is no point in declaring it static; it is an error to do so. The compiler will detect and report this error.

Inner classes:-

You define an inner class within a top-level class.

Here we go with an example.

class MyStatic {

static class MyStaticInnerClass {

void innerClassObject() {

System.out.println("MyStaticInnerClass called");

}

}

}

class SecondClass {

static class MyStaticSecondInnerClass {

void secoundClassObject() {

System.out.println("MyStaticSecondInnerClass called");

}

}

public static void main(String[] args) {

MyStatic.MyStaticInnerClass objInnerClass = new MyStatic.MyStaticInnerClass();

SecondClass.MyStaticSecondInnerClass objSecondClass = new SecondClass.MyStaticSecondInnerClass();

objInnerClass.innerClassObject();

objSecondClass.secoundClassObject();

}

}

When we execute this code, we'll get below messages.

MyStaticInnerClass called

MyStaticSecondInnerClass called