Mediator Pattern Use Cases and Examples in Java

Mediator is strongest where collaboration rules are dense and central.

Strong Java Use Cases

• multi-widget UI coordination
• booking or checkout flows with several screens or components
• wizard-like workflows
• component interaction in modular desktop apps

Weak Java Use Cases

Mediator is weak when:

• only two collaborators interact
• the interaction is already simple and readable
• the mediator would become a grab bag for unrelated workflow logic

Use it when collaboration centralization improves clarity more than it adds indirection.