A Programmer’s Guide to Java™ SCJP Certification: A Comprehensive Primer, Third Edition

14 Generics

Exam Objectives

6.4 Develop code that makes proper use of type parameters in class/interface declarations, instance variables, method arguments, and return types; and write generic methods or methods that make use of wildcard types and understand the similarities and differences between these two approaches.

Supplementary Objectives

• Distinguishing between generic types and parameterized types

• Identifying contexts where unchecked warnings can be issued, and why they signal potential problems with type-safety

• Using bounded type parameters

• Understanding type capture

• Understanding implications of type erasure

• Understanding implications for overloading and overriding

• Understanding reifiable types, ...