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java-design-patterns/double-dispatch/index.md
Markus fdb9be1e76 Work towards #56: Add permalink to every pattern 
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layout, title, folder, permalink, categories, tags
layout title folder permalink categories tags
pattern Double Dispatch double-dispatch /patterns/double-dispatch/ pattern_cat pattern_tag

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

alt text

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: