Lesson 6 of 714 minModule progress 0%

Module 12: Generics and Type Safety

Type Erasure & Limitations

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

Type information is erased at runtime; generics exist at compile time for type checking.

You cannot instantiate generic type parameters (new T()) or create arrays of parameterized types.

Use Class<T> tokens or helper factories to work around erasure when necessary.

Advertisement

Lesson check

Why can’t you create arrays of parameterized types?

Next lesson →