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Effective Java, 2nd Edition

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Effective Java, 2nd Edition

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Description

  • Copyright 2008
  • Dimensions: 7-3/8 X 9-1/4
  • Pages: 384
  • Edition: 2nd
  • Book
  • ISBN-10: 0-321-35668-3
  • ISBN-13: 978-0-321-35668-0

Are you looking for a deeper understanding of the Java™ programming language so that you can write code that is clearer, more correct, more robust, and more reusable? Look no further! Effective Java™, Second Edition, brings together seventy-eight indispensable programmer’s rules of thumb: working, best-practice solutions for the programming challenges you encounter every day.

This highly anticipated new edition of the classic, Jolt Award-winning work has been thoroughly updated to cover Java SE 5 and Java SE 6 features introduced since the first edition. Bloch explores new design patterns and language idioms, showing you how to make the most of features ranging from generics to enums, annotations to autoboxing.

Each chapter in the book consists of several “items” presented in the form of a short, standalone essay that provides specific advice, insight into Java platform subtleties, and outstanding code examples. The comprehensive descriptions and explanations for each item illuminate what to do, what not to do, and why.

Highlights include:

  • New coverage of generics, enums, annotations, autoboxing, the for-each loop, varargs, concurrency utilities, and much more
  • Updated techniques and best practices on classic topics, including objects, classes, libraries, methods, and serialization
  • How to avoid the traps and pitfalls of commonly misunderstood subtleties of the language
  • Focus on the language and its most fundamental libraries: java.lang, java.util, and, to a lesser extent, java.util.concurrent and java.io

Simply put, Effective Java™, Second Edition, presents the most practical, authoritative guidelines available for writing efficient, well-designed programs.

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Creating and Destroying Java Objects

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Table of Contents

Foreword xi

Preface xiii

Acknowledgments xvii

Chapter 1: Introduction 1

Chapter 2: Creating and Destroying Objects 5

Item 1: Consider static factory methods instead of constructors 5

Item 2: Consider a builder when faced with many constructor

parameters 11

Item 3: Enforce the singleton property with a private constructor 17

Item 4: Enforce noninstantiability with a private constructor 19

Item 5: Avoid creating unnecessary objects 20

Item 6: Eliminate obsolete object references 24

Item 7: Avoid finalizers 27

Chapter 3: Methods Common to All Objects 33

Item 8: Obey the general contract when overriding equals 33

Item 9: Always override hashCode when you override equals 45

Item 10: Always override toString 51

Item 11: Override clone judiciously 54

Item 12: Consider implementing Comparable 62

Chapter 4: Classes and Interfaces 67

Item 13: Minimize the accessibility of classes and members 67

Item 14: In public classes, use accessor methods, not public fields 71

Item 15: Minimize mutability 73

Item 16: Favor composition over inheritance 81

Item 17: Design and document for inheritance or else prohibit it 87

Item 18: Prefer interfaces to abstract classes 93

Item 19: Use interfaces only to define types 98

Item 20: Prefer class hierarchies to tagged classes 100

Item 21: Use function objects to represent strategies 103

Item 22: Favor static member classes over nonstatic 106

Chapter 5: Generics 109

Item 23: Don't use raw types in new code 109

Item 24: Eliminate unchecked warnings 116

Item 25: Prefer lists to arrays 119

Item 26: Favor generic types 124

Item 27: Favor generic methods 129

Item 28: Use bounded wildcards to increase API flexibility 134

Item 29: Consider typesafe heterogeneous containers 142

Chapter 6: Enums and Annotations 147

Item 30: Use enums instead of int constants 147

Item 31: Use instance fields instead of ordinals 158

Item 32: Use EnumSet instead of bit fields 159

Item 33: Use EnumMap instead of ordinal indexing 161

Item 34: Emulate extensible enums with interfaces 165

Item 35: Prefer annotations to naming patterns 169

Item 36: Consistently use the Override annotation 176

Item 37: Use marker interfaces to define types 179

Chapter 7: Methods 181

Item 38: Check parameters for validity 181

Item 39: Make defensive copies when needed 184

Item 40: Design method signatures carefully 189

Item 41: Use overloading judiciously 191

Item 42: Use varargs judiciously 197

Item 43: Return empty arrays or collections, not nulls 201

Item 44: Write doc comments for all exposed API elements 203

Chapter 8: General Programming 209

Item 45: Minimize the scope of local variables 209

Item 46: Prefer for-each loops to traditional for loops 212

Item 47: Know and use the libraries 215

Item 48: Avoid float and double if exact answers are required 218

Item 49: Prefer primitive types to boxed primitives 221

Item 50: Avoid strings where other types are more appropriate 224

Item 51: Beware the performance of string concatenation 227

Item 52: Refer to objects by their interfaces 228

Item 53: Prefer interfaces to reflection 230

Item 54: Use native methods judiciously 233

Item 55: Optimize judiciously 234

Item 56: Adhere to generally accepted naming conventions 237

Chapter 9: Exceptions 241

Item 57: Use exceptions only for exceptional conditions 241

Item 58: Use checked exceptions for recoverable conditions and runtime exceptions for programming errors 244

Item 59: Avoid unnecessary use of checked exceptions 246

Item 60: Favor the use of standard exceptions 248

Item 61: Throw exceptions appropriate to the abstraction 250

Item 62: Document all exceptions thrown by each method 252

Item 63: Include failure-capture information in detail messages 254

Item 64: Strive for failure atomicity 256

Item 65: Don’t ignore exceptions 258

Chapter 10: Concurrency 259

Item 66: Synchronize access to shared mutable data 259

Item 67: Avoid excessive synchronization 265

Item 68: Prefer executors and tasks to threads 271

Item 69: Prefer concurrency utilities to wait and notify 273

Item 70: Document thread safety 278

Item 71: Use lazy initialization judiciously 282

Item 72: Don’t depend on the thread scheduler 286

Item 73: Avoid thread groups 288

Chapter 11: Serialization 289

Item 74: Implement Serializable judiciously 289

Item 75: Consider using a custom serialized form 295

Item 76: Write readObject methods defensively 302

Item 77: For instance control, prefer enum types to readResolve 309

Item 78: Consider serialization proxies instead of serialized instances 313

Appendix: Items Corresponding to First Edition 317

References 321

Index of Patterns and Idioms 327

Index 331

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