Pre-requisite : 

• Marker Interface in Java and Use
• Learn Shallow and Deep Cloning

Below are  the list of differences between shallow cloning and deep cloning in java.

Shallow Cloning

• Cloned Object and original object are not 100% disjoint.
• Any changes made to cloned object will be reflected in original object or vice versa.
• Default version of clone method creates the shallow copy of an object.
• Shallow copy is preferred if an object has only primitive fields.
• Shallow copy is fast and also less expensive.

Example: Shallow Cloning Example

Deep Cloning

• Cloned Object and original object are 100% disjoint.
• Any changes made to cloned object will not be reflected in original object or vice versa.
• To create the deep copy of an object, you have to override clone method.
• Deep copy is preferred if an object has references to other objects as fields.
• Deep copy is slow and very expensive.

Example: Deep Cloning Example