Intermediate module

Module 12: Generics and Type Safety

Write reusable code without losing type safety, and learn the generic features that show up most in real Java projects.

Module lessons

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See how generics remove unsafe casts and make reusable code safer.

Create generic classes and interfaces that work with more than one type.

Write methods that infer types and stay readable at the call site.

Use bounds to say what a type must support without giving up flexibility.

Understand ? extends and ? super with simple producer and consumer rules.

Learn what Java removes at runtime so generic code makes more sense.

Build a small generic queue to practice type-safe design.