← Exit to Module 12: Generics and Type Safety lessons
Module progress · 0%Lesson · 14 min
Module 12: Generics and Type Safety
Lesson focusType Erasure & Limitations
Understand how the JVM implements generics and why some operations are forbidden.
01 · 12 minWhy Generics?Locked02 · 16 minGeneric Classes & InterfacesLocked03 · 15 minGeneric MethodsLocked04 · 18 minBounded Type ParametersLocked05 · 16 minWildcards & VarianceLocked06 · 14 minType Erasure & LimitationsLocked07 · 30 minMini-Project: Generic Data StructureLocked
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.