cloneable interface

[virus]

Hello, I am new to java. i want to know how the clneable interface works?
clone merhod belongs to Object class. As far as i know every class implicitly extends Object class. why i vw to implement cloneable interface to call the clone method? please clear my doubts....

[r035198x]

Hello, I am new to java. i want to know how the clneable interface works?
clone merhod belongs to Object class. As far as i know every class implicitly extends Object class. why i vw to implement cloneable interface to call the clone method? please clear my doubts....

Read the first 4 lines of the API specs for it.

[JosAH]

Sometimes you don't want objects of your class to be cloneable (think of
singletons). The clone() method checks whether or not your class (or a parent
of it) implements the Cloneable interface. If it does it clones your object. If it
doesn't it throws an Exception. It's just a safety measure.

kind regards,

Jos

[JosAH]

Darn, too slow again ...

kind regards,

Jos ;-)

[BigDaddyLH]

This chapter from "Effective Java" has an excellent discussion of several overridable Object methods, including clone. It's required reading!

http://java.sun.com/developer/Books/effectivejava/Chapter3.pdf

[destiny23]

The simple reason why one cannot directly use Object.clone() method without implementing Cloneable interface is that Object.clone is a protected method.

[BigDaddyLH]

The simple reason why one cannot directly use Object.clone() method without implementing Cloneable interface is that Object.clone is a protected method.

While that's true, in order to implement a proper cloning strategy one should read that article!