Composite Design Pattern in Java

This post looks at how to use the composite design pattern in Java, specifically the objects used in the pattern: component, composite, leaf, and client.

Here I am with another useful design pattern for you — the composite design pattern. I will try to point out the key features to remember while implementing the composite pattern for you.

Composite Design Pattern

The composite pattern is meant to "compose objects into a tree structure to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly"

• Composite design patterns describe groups of objects that can be treated in the same way as a single instance of the same object type.
• The composite pattern allows us to "compose" objects into tree structures to represent part-whole hierarchies.
• In addition, the composite patterns also allow our clients to treat individual objects and compositions in the same way.
• Composite patterns allow us to have a tree structure for each node that performs a task.
• In object-oriented programming, a composite is an object designed as a composition of one-or-more similar objects, all exhibiting similar functionality. This is known as a “has-a” relationship between objects.

java tutorial design patterns client component composite composite design pattern

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