Page History

...

• Returning this from a non-private method
• Passing this as a parameter to a method belonging to another class
• Publishing this from the constructor of an object under construction
• Publishing this such that pieces of code beyond its current scope can obtain its reference
• Calling a non-final method from a constructor (MET04-J. Ensure that constructors do not call overridable methods)
• Overriding the finalizer of a non-final class when its construction and obtaining the this reference of a partially constructed instance, when the construction of the object ceases (OBJ04-J. Do not allow partially initialized objects to be accessed). This is a special case of the previous point.

This guideline focuses on the potential consequences of this escaping during object construction including race conditions and improper initialization.

...