what is d difference between deep cloning and shallow
cloning in core java?
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Answer Posted / sunny
Deep cloning - You clone the object and their constituent parts.
This kind of cloning is adequated when the parts of the
object make up the object, and can not be separated from it.
A car HAS four wheels, and to clone (copy) a car, I must
clone their four wheels.
Shallow cloning - You clone only the object, not their
parts. You add references to their parts.
This kind of cloning is adequated when the parts of the
object are independent of it.
An entry in an address book has the street name, the city
name. To clone that entry, you simply add references to the
street and city names.
That distinction is a little difficult to be done in Java,
but is better understood if you think in terms of databases.
You need deep cloning if the entity requires "cascade
deleting" to be deleted. You need shallow cloning if
"cascade deleting" is not needed.
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