clone methode

[omar bili]

Hi
the clone method: what does it do?
is it another reference to the same class, if yes how can i really
clone an object, so i can have 2 different objects?
Best

[Avisesh Jain]

Check out his link for more details on clone method.

http://java.sun.com/docs/books/tutorial/java/javaOO/objectclass.html

[Layne Lund]

Originally posted by omar bili:
Hi
the clone method: what does it do?
is it another reference to the same class, if yes how can i really
clone an object, so i can have 2 different objects?
Best

In Java, we don't have references to classes. We have references to objects (instances of classes) instead. The clone() method returns a new reference to a new object (a clone). However, there are some details that are discussed in the web page given by Avisesh's link above. I'll let you read that before I go on.

Please come back with more questions if you run into problems.

Layne

[omar bili]

Hi,
What i need to know, if i clone an instance of a class

Box b = new Box() ;

b.height = 100 ;

Box a = b.clone() ;
a.height = 200 ;

here b.height = ?? is it 100 or 200

a and b refer to the same istance, any changes in a will be
applied to b, or a and b are totally different instances, in
the memory?
Kind regards, Bili

[Avisesh Jain]

"Object's implementation of the clone method creates an object of the same type as the original object and initializes the new object's member variables to have the same values as the original object's corresponding member variables"

I hope this will clear your doubts.
[ March 22, 2005: Message edited by: Avisesh Jain ]