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Software design Design patterns GOF Structural Patterns Composite

The Composite design pattern belongs to the structural patterns and brings the recommended solution to the situation when we are working with a tree structure. It is, for example, a recursively nested navigation menu, when each item can be either a menu item (leaf) or another submenu (subtree).


We can encounter tree structures very often. Besides the already mentioned navigation menu, you have probably already needed a tree of product categories where the categories may contain other subcategories. Of course, the pattern can be used to represent a directory structure where a folder can contain both subfolders and files. From the design point of view, it makes sense to provide


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The Composite design pattern provides the recommended solution for working with tree structures, such as navigation menus.

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Article has been written for you by David Capka
The author is a programmer, who likes web technologies and being the lead/chief article writer at He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn College The author learned IT at the Unicorn College - a prestigious college providing education on IT and economics.
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