layout	pattern
title	Double Dispatch
folder	double-dispatch
permalink	/patterns/double-dispatch/
pumlid	NSbB3iCW303HgpG70Ezx6yTOWSeOv4zp_MRTtUZDCPGa6wV9gqTiVmCOtlKQqVDCPwEbmHgLreGXUMEWmGU_M1hxkBHiZ61JXud-1BILft1fmvz37JZetshQh3kd_000
categories	Other
tags	Java Difficulty-Intermediate Idiom

Intent

Double Dispatch pattern is a way to create maintainable dynamic behavior based on receiver and parameter types.

Applicability

Use the Double Dispatch pattern when

• the dynamic behavior is not defined only based on receiving object's type but also on the receiving method's parameter type.

Real world examples

• ObjectOutputStream