Java Language Features: With Modules, Streams, Threads, I/O, and Lambda Expressions

© Kishori Sharan 2018

Kishori SharanJava Language Featureshttps://doi.org/10.1007/978-1-4842-3348-1_4

4. Generics

Kishori Sharan¹ 

(1)

Montgomery, Alabama, USA

 

In this chapter, you will learn:

• What generics are

• How to define generic types, methods, and constructors

• How to define bounds for type parameters

• How to use wildcards as the actual type parameters

• How the compiler infers the actual type parameters for generic type uses

• Generics and their limitations in array creations

• How the incorrect use of generics may lead to heap pollution

All example programs in this chapter are a member of a jdojo.generics module, as declared in Listing 4-1.

// module-info.java

module jdojo.generics {

    exports com.jdojo.generics;

}

Listing 4-1.

The Declaration of a jdojo.generics ...