static ?

[Gary Kevin]

Hi,All

 
 
class MyClass 
{
  static String myName = "SCJP";
  
MyClass getMyClass() 
  {     
     System.out.println(myName);
     return null;     
  }
 
  public static void main(String[ ] args) 
  {
    System.out.println( new MyClass().getMyClass().myName );
  }
}
 

Why the code outprint "SCJP SCJP"?Why it does not throw a null Exception?

[Abdullah Mamun]

Since myName is a static, it is related to the class not any instance of that class. Though you have a reference with null it has no effect on the static variable myName, so you are not getting any NullPointerException.

But if you remove the static modifier from the declaration of myName, you will definitely get an exception.

[Gary Kevin]

I can't understand.new MyClass().getMyClass() will return null and how can we write code like " null.myName "?

[Neha Bhattad]

When you try to access static members, like
>> new MyClass().someMethod().staticMember

internally it is replaced with ClassType.staticMember.

So doesnt matter if the reference variable is null -- as long as we can find out what the type is.