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Method overriding
Method overriding, in object oriented programming, is a language feature that allows a subclass or child class to provide a specific implementation of a method that is already provided by one of its superclasses or parent classes. The implementation in the subclass overrides (replaces) the implementation in the superclass by providing a method that has same name, same parameters or signature, and same return type as the method in the parent class.〔Flanagan 2002, p. 107〕 The version of a method that is executed will be determined by the object that is used to invoke it. If an object of a parent class is used to invoke the method, then the version in the parent class will be executed, but if an object of the subclass is used to invoke the method, then the version in the child class will be executed.〔Lewis & Loftus 2006, p.454〕 Some languages allow a programmer to prevent a method from being overridden.
==Language-specific examples==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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