What is the need to clone  an object

What is the need to clone an object
give me the scenarios where we use cloneable interface

In a very simple statements,
clone method will return the new object with the
SAME SOURCE STATE. Where as
creating an object using "new" will give completely
new object.According to whom? I was under the impression that the state of the object returned by calling close was not defined except from what is returned by the Object class.
As for clone being faster than constructors, it can be. It depends on what the constructor does. For instance, I'm sure its faster to clone an ArrayList than to create a new one by passing the old one into its constructor. Depends on the implementation of the constructor vs. the implementation of the clone.
Again, do not expose clone because its behavior is not defined. Create an interface with a methd on it, and define what that method returns. Then use clone to create your base object to construct the copy to return.

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