Core Java® Volume I–Fundamentals

415

Chapter 8: Generic Programming ..............................................................

416

Why Generic Programming? ..................................................................

8.1

416

The Advantage of Type Parameters .........................................

8.1.1

417

Who Wants to Be a Generic Programmer? .............................

8.1.2

418

Defining a Simple Generic Class ...........................................................

8.2

421

Generic Methods ......................................................................................

8.3

422

Bounds for Type Variables ......................................................................

8.4

425

Generic Code and the Virtual Machine ................................................

8.5

425

Type Erasure ..............................................................................

8.5.1

426

Translating Generic Expressions .............................................

8.5.2

427

Translating Generic Methods ..................................................

8.5.3

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Contents

From the Library of Hristo Dimov Hristov

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ptg18360597

429

Calling Legacy Code .................................................................

8.5.4

430

Restrictions and Limitations ..................................................................

8.6

430

Type Parameters Cannot Be Instantiated with Primitive

Types ...........................................................................................

8.6.1

431

Runtime Type Inquiry Only Works with Raw Types ...........

8.6.2

431

You Cannot Create Arrays of Parameterized Types  ............

8.6.3

432

Varargs Warnings ......................................................................

8.6.4

433

You Cannot Instantiate Type Variables ..................................

8.6.5

434

You Cannot Construct a Generic Array .................................

8.6.6

436

Type Variables Are Not Valid in Static Contexts of Generic

Classes .........................................................................................

8.6.7

436

You Cannot Throw or Catch Instances of a Generic Class ...

8.6.8

437

You Can Defeat Checked Exception Checking .....................

8.6.9

439

Beware of Clashes after Erasure ..............................................

8.6.10

440

Inheritance Rules for Generic Types .....................................................

8.7

442

Wildcard Types ........................................................................................

8.8

442

The Wildcard Concept ..............................................................

8.8.1

444

Supertype Bounds for Wildcards ............................................

8.8.2

447

Unbounded Wildcards .............................................................

8.8.3

448

Wildcard Capture ......................................................................

8.8.4

450

Reflection and Generics ..........................................................................

8.9

450

The Generic 

Class

 Class ..............................................................

8.9.1

452

Using 

Class

 Parameters for Type Matching ........................

8.9.2

452

Generic Type Information in the Virtual Machine ................

8.9.3