Question: What is shallow and deep cloning in Java?

What is a shallow clone Java?

A shallow copy is a copy of the reference pointer to the object, whereas a deep copy is a copy of the object itself. In Java, objects are kept in the background, what you normally interact with when dealing with the objects is the pointers. The variable names point to the memory space of the object.

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 shallow clone?

The default implementation of the clone method creates a shallow copy of the source object, it means a new instance of type Object is created, it copies all the fields to a new instance and returns a new object of type ‘Object’. This Object explicitly needs to be typecast in object type of source object.

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What is git clone depth?

“Clone depth” is a feature of git to reduce server load: Instead of cloning the complete repository (as usually done with git), using clone depth just clones the last clone-depth-number revisions of your repository. … So using a full clone (or a larger clone depth) means you can see all the tags in your repository.

Is equal method in Java?

Java String equals() Method

The equals() method compares two strings, and returns true if the strings are equal, and false if not. Tip: Use the compareTo() method to compare two strings lexicographically.

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.