checkstyle – SuperClone

SuperClone

Since Checkstyle 3.2

Description

Checks that an overriding clone() method invokes super.clone(). Does not check native methods, as they have no possible java defined implementation.

Reference: Object.clone().

Examples

To configure the check:

<module name="Checker">
  <module name="TreeWalker">
    <module name="SuperClone"/>
  </module>
</module>

Example:

class A {

 public Object clone() { // OK
  return super.clone();
 }
}

class B {
private int b;

 public B clone() { // violation, does not call super.clone()
  B other = new B();
  other.b = this.b;
  return other;
 }
}

class C {

 public C clone() { // OK
  return (C) super.clone();
 }
}