Cloneable and cloneable Interfaces

Cloneable and cloneable Interfaces
Object java. lang. Object. clone () throws CloneNotSupportedException
Creates and returns a copy of the object.
Although the clone () method is an Object class method, your class must implement the java. lang. Cloneable interface. Otherwise, the error java. lang. CloneNotSupportedException will be reported.
The effect is to create a new object and copy the object field by field, which is implemented by jvm. For the reference type, jvm only helps you to make a small copy. If you need to make a deep copy, you have to implement it yourself.

After the equals () method is rewritten, the result is x. clone ()! = X is true, x. clone (). equals (x) is true.

It must be noted that there are no methods in the java. lang. Cloneable interface.

Example: