What is shallow clone Java?

Is Java clone deep or shallow?

clone() is indeed a shallow copy. However, it’s designed to throw a CloneNotSupportedException unless your object implements Cloneable . And when you implement Cloneable , you should override clone() to make it do a deep copy, by calling clone() on all fields that are themselves cloneable.

Can we override clone method in Java?

Every language which supports cloning of objects has its own rules and so does java. In java, if a class needs to support cloning it has to do following things: You must implement Cloneable interface. You must override clone() method from Object class.

How do you distinguish between copy copy () and copy Deepcopy ()?

copy — Shallow and deep copy operations

  • A shallow copy constructs a new compound object and then (to the extent possible) inserts references into it to the objects found in the original.
  • A deep copy constructs a new compound object and then, recursively, inserts copies into it of the objects found in the original.

What does the clone method do is it shallow or deep?

Default version of clone method creates the shallow copy of an object. To create the deep copy of an object, you have to override clone method. Shallow copy is preferred if an object has only primitive fields. Deep copy is preferred if an object has references to other objects as fields.

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Is Java clone shallow copy?

clone() is a deep copy, not a shallow copy.

Is ArrayList clone a deep copy?

ArrayList clone() – ArrayList deep copy and shallow copy.

ArrayList clone() method is used to create a shallow copy of the list. In the new list, only object references are copied. If we change the object state inside the first ArrayList, then the changed object state will be reflected in the cloned ArrayList as well.

Can we see clone method without overriding in any class?

Having said that, you should not override clone method, as it is broken . Because, for a class to be cloned, you need to implement the Cloneable interface. And then your class uses the clone method of Object class instead.

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