What is a cloneable interface and how many methods does it contain

?– It is not having any method because it is a TAGGED or MARKER interface.

In Java, the Cloneable interface is a marker interface, which means it doesn’t contain any methods. Marker interfaces are used to indicate a special behavior or capability that a class should have. In the case of Cloneable, it indicates that the objects of the class implementing it can be cloned using the Object class’s clone() method.

However, it’s important to note that just implementing the Cloneable interface doesn’t guarantee a successful cloning. The class must also override the clone() method from the Object class and provide its own implementation. The clone() method in the Object class is declared as protected, so the overriding method should also be declared as public.

Here’s an example:

java
public class MyClass implements Cloneable {
// fields and methods of the class
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}

In this example, MyClass implements the Cloneable interface, and it overrides the clone() method to call super.clone(). The CloneNotSupportedException is thrown by Object‘s clone() method, so it needs to be handled or declared in the method signature.