TIOBE - Java Coding Standard

Rule: TypeResolution2

This rule is Obsolete
Synopsis:	clone() method should be implemented only if implementing Cloneable interface
Language:	Java
Severity Level:	6
Category:	TypeResolution

Description:

The method clone() should only be implemented if the class implements the Cloneable interface with the exception of a final method that only throws CloneNotSupportedException. This version uses PMD's type resolution facilities, and can detect if the class implements or extends a Cloneable class

public class MyClass {
 public Object clone() throws CloneNotSupportedException {
  return foo;
 }
}