Intermediate

Module 12: Generics and Type Safety

Parameterize types for reusable, type-safe APIs across collections and custom data structures.

7 lessonsGuided quizzesProjects & habits

Lesson list

0/7 complete0%

See how generics eliminate casts and runtime ClassCastException problems.

Define type parameters on classes to reuse logic for multiple data types.

Parameterize individual methods even inside non-generic classes.

Use upper and lower bounds to restrict acceptable types.

Express flexible APIs with wildcard types.

Understand how the JVM implements generics and why some operations are forbidden.

Implement a generic cache or queue with bounded type parameters and Optional results.