Software Architecture & Engineering

Facade-pattern notes with UML plus Java and Go examples that wrap a complex process behind one interface.

Bridge-pattern notes for class hierarchies with multiple varying dimensions, with UML and a Java brand/device example.

Composite-pattern notes for tree-shaped whole/part structures, with Java and Go file-tree examples.

Mediator-pattern notes with UML, a Java department example, and a Go computer-component example.

Command-pattern notes with a Java Course example, command objects, and a command invoker.

Memento-pattern notes showing how to save an object's state and restore it later.

A minimal original note for the interpreter design pattern.

Visitor-pattern notes separating data structures from operations, with a Java course example.

Iterator-pattern notes showing Java and Go implementations for traversing aggregate objects.

A short index note linking object-oriented design principles and design patterns.