when object is created when refrence is assigned???

*Remeber object is always created when you declare an object of class type and refrence is always assigned when u called constructor of that class.
for example

class welcome{

private String greet;

public welcome()

{

greet="Welcome to Java......................!!!!";

}

public void displayGreeting()

{

System.out.println("Greeting :   "+greet);

}

}

public class Demo

{

public static void Main(String[] args)

{

1) welcome w;          

2) w.displayGreeting();           //generates an error of uninitialized object but the matter it has no refrence and                  dont know where to point.

3) welcome wel=new welcome();         //object type :welcome and refrence of:welcome

4) wel.displayGreeting();

}

}

*Remember statment 1 and 2 will not compile and elt the program run but statment 3 and 4 will behave exactly as like an normal and successful program is supposed to behave.