this Refrence Problem

[Vipin Raturi]

hi all,
i am new member in your javaranch family and scjp preperation as well as.
i have problem with below code. please check it.

class vipin{
public static void main(String[] arg){
System.out.println("Class Name is"+this.getClass().getName());
}
}

It shows some problem on compilation. but if, i make an object of vipin class and do it like.

class vipin{
public static void main(String[] arg){
vipin obj=new vipin();
System.out.println("Class Name is"+ obj.getClass().getName());
}
}

now,It gives name of class. as, i expected.
So, what is the problem with this refrence. i m using jdk1.4
Please, anybody reply this problem.

[Anu Pillai]

Its giving an error because the keyword 'this' cannot be used in a static method. Give that statement in another method and call this method from main, it will work.

  public class Vipin {
 
public static void main(String[] args) {
Vipin obj = new Vipin();
                obj.getClassName();
}
 
public void getClassName(){
System.out.println("Class Name is: "+this.getClass().getName());
}
}  

[fred Joly]

You can not use "this" in "main wich is a static method
because "this" refers to an object and a static method
can only refer to a class (not an instanciation)

[Ramna Reddy]

"this" and "super" can not be used in static blocks & methods.