OCP: Oracle Certified Professional Java Se 8 Programmer II Study Guide: Exam 1Z0-809

Cover......Page 1
Title Page......Page 5
Copyright......Page 6
Acknowledgments......Page 8
About the Authors......Page 9
Contents at a Glance......Page 11
Contents......Page 13
Introduction......Page 21
Assessment Test......Page 40
Answers to Assessment Test......Page 50
Chapter 1 Advanced Class Design......Page 53
  Access Modifiers......Page 54
  Overloading and Overriding......Page 56
  Abstract Classes......Page 57
  Imports......Page 58
 Using instanceof......Page 59
 Understanding Virtual Method Invocation......Page 61
 Annotating Overridden Methods......Page 63
  toString......Page 65
  equals......Page 67
  hashCode......Page 70
 Working with Enums......Page 72
  Using Enums in Switch Statements......Page 73
  Adding Constructors, Fields, and Methods......Page 74
 Creating Nested Classes......Page 76
  Member Inner Classes......Page 77
  Local Inner Classes......Page 79
  Anonymous Inner Classes......Page 81
  Static Nested Classes......Page 83
 Summary......Page 85
 Exam Essentials......Page 86
 Review Questions......Page 88
Chapter 2 Design Patterns and Principles......Page 99
 Designing an Interface......Page 100
  Purpose of an Interface......Page 103
 Introducing Functional Programming......Page 104
  Defining a Functional Interface......Page 105
  Implementing Functional Interfaces with Lambdas......Page 107
  Applying the Predicate Interface......Page 112
 Implementing Polymorphism......Page 113
  Distinguishing between an Object and a Reference......Page 115
  Casting Object References......Page 116
  Encapsulating Data......Page 118
  Creating JavaBeans......Page 121
  Applying the Is-a Relationship......Page 123
  Applying the Has-a Relationship......Page 125
  Composing Objects......Page 126
 Working with Design Patterns......Page 127
  Applying the Singleton Pattern......Page 128
  Creating Immutable Objects......Page 134
  Using the Builder Pattern......Page 138
  Creating Objects with the Factory Pattern......Page 141
 Exam Essentials......Page 145
 Review Questions......Page 147
Chapter 3 Generics and Collections......Page 155
  Array and ArrayList......Page 156
  Searching and Sorting......Page 157
  Wrapper Classes and Autoboxing......Page 158
  The Diamond Operator......Page 159
 Working with Generics......Page 160
  Generic Classes......Page 161
  Generic Interfaces......Page 164
  Interacting with Legacy Code......Page 166
  Bounds......Page 169
  Putting It All Together......Page 174
 Using Lists, Sets, Maps, and Queues......Page 176
  Common Collections Methods......Page 177
  Using the List Interface......Page 179
  Using the Set Interface......Page 184
  Using the Queue Interface......Page 186
  Map......Page 190
  Comparing Collection Types......Page 192
  Comparable......Page 195
  Comparator......Page 198
 Searching and Sorting......Page 202
  Using Method References......Page 204
  Removing Conditionally......Page 206
  Using New Java 8 Map APIs......Page 207
 Summary......Page 211
 Exam Essentials......Page 213
 Review Questions......Page 214
Chapter 4 Functional Programming......Page 223
 Using Variables in Lambdas......Page 224
 Working with Built-In Functional Interfaces......Page 225
  Implementing Supplier......Page 226
  Implementing Consumer and BiConsumer......Page 227
  Implementing Predicate and BiPredicate......Page 229
  Implementing Function and BiFunction......Page 230
  Implementing UnaryOperator and BinaryOperator......Page 232
  Checking Functional Interfaces......Page 233
 Returning an Optional......Page 234
 Using Streams......Page 237
  Creating Stream Sources......Page 240
  Using Common Terminal Operations......Page 241
  Using Common Intermediate Operations......Page 248
  Putting Together the Pipeline......Page 252
  Printing a Stream......Page 256
  Creating Primitive Streams......Page 257
  Using Optional with Primitive Streams......Page 260
  Learning the Functional Interfaces for Primitives......Page 262
  Linking Streams to the Underlying Data......Page 265
  Chaining Optionals......Page 266
  Collecting Results......Page 269
 Summary......Page 275
 Exam Essentials......Page 276
 Review Questions......Page 278
Chapter 5 Dates, Strings, and Localization......Page 285
 Working with Dates and Times......Page 286
  Creating Dates and Times......Page 287
  Manipulating Dates and Times......Page 293
  Working with Periods......Page 296
  Working with Durations......Page 299
  Accounting for Daylight Savings Time......Page 303
 Reviewing the String class......Page 305
 Adding Internationalization and Localization......Page 307
  Picking a Locale......Page 308
  Using a Resource Bundle......Page 310
  Formatting Numbers......Page 319
  Formatting Dates and Times......Page 322
 Summary......Page 325
 Exam Essentials......Page 326
 Review Questions......Page 328
Chapter 6 Exceptions and Assertions......Page 335
  Exceptions Terminology......Page 336
  Categories of Exceptions......Page 337
  Exceptions on the OCP......Page 338
  Try Statement......Page 340
 Creating Custom Exceptions......Page 341
 Using Multi-catch......Page 343
 Using Try-With-Resources......Page 348
  Try-With-Resources Basics......Page 350
  AutoCloseable......Page 352
  Suppressed Exceptions......Page 354
 Rethrowing Exceptions......Page 357
  The assert Statement......Page 360
  Enabling Assertions......Page 361
  Using Assertions......Page 362
 Summary......Page 366
 Exam Essentials......Page 367
 Review Questions......Page 368
Chapter 7 Concurrency......Page 377
 Introducing Threads......Page 379
  Understanding Thread Concurrency......Page 380
  Introducing Runnable......Page 382
  Creating a Thread......Page 383
  Polling with Sleep......Page 386
  Introducing the Single-Thread Executor......Page 387
  Shutting Down a Thread Executor......Page 389
  Submitting Tasks......Page 390
  Waiting for Results......Page 392
  Scheduling Tasks......Page 397
  Increasing Concurrency with Pools......Page 400
 Synchronizing Data Access......Page 402
  Protecting Data with Atomic Classes......Page 404
  Improving Access with Synchronized Blocks......Page 406
  Synchronizing Methods......Page 408
  Understanding the Cost of Synchronization......Page 409
  Introducing Concurrent Collections......Page 410
  Understanding Memory Consistency Errors......Page 411
  Working with Concurrent Classes......Page 412
  Obtaining Synchronized Collections......Page 417
  Creating Parallel Streams......Page 418
  Processing Tasks in Parallel......Page 419
  Processing Parallel Reductions......Page 424
  Creating a CyclicBarrier......Page 429
  Applying the Fork/Join Framework......Page 433
  Understanding Liveness......Page 439
  Managing Race Conditions......Page 443
 Summary......Page 444
 Exam Essentials......Page 445
 Review Questions......Page 446
Chapter 8 IO......Page 457
  Conceptualizing the File System......Page 458
  Introducing the File Class......Page 459
  Stream Fundamentals......Page 463
  Stream Nomenclature......Page 464
  Common Stream Operations......Page 470
  The FileInputStream and FileOutputStream Classes......Page 472
  The FileReader and FileWriter classes......Page 476
  The ObjectInputStream and ObjectOutputStream Classes......Page 478
  The PrintStream and PrintWriter Classes......Page 484
  Review of Stream Classes......Page 487
  The Old Way......Page 489
  The New Way......Page 490
 Summary......Page 494
 Exam Essentials......Page 495
 Review Questions......Page 497
Chapter 9 NIO.2......Page 505
 Introducing NIO.2......Page 506
  Introducing Path......Page 507
  Creating Paths......Page 508
 Interacting with Paths and Files......Page 512
  Providing Optional Arguments......Page 513
  Using Path Objects......Page 514
  Interacting with Files......Page 523
  Discovering Basic File Attributes......Page 530
  Improving Access with Views......Page 535
  Conceptualizing Directory Walking......Page 539
  Walking a Directory......Page 540
  Searching a Directory......Page 542
  Listing Directory Contents......Page 543
  Printing File Contents......Page 544
 Comparing Legacy File and NIO.2 Methods......Page 546
 Exam Essentials......Page 547
 Review Questions......Page 549
Chapter 10 JDBC......Page 557
 Introducing Relational Databases and SQL......Page 559
  Identifying the Structure of a Relational Database......Page 560
  Writing Basic SQL Statements......Page 562
 Introducing the Interfaces of JDBC......Page 563
  Building a JDBC URL......Page 565
  Getting a Database Connection......Page 567
 Obtaining a Statement......Page 570
  Choosing a ResultSet Type......Page 571
 Executing a Statement......Page 572
  Reading a ResultSet......Page 576
  Getting Data for a Column......Page 578
  Scrolling ResultSet......Page 581
 Closing Database Resources......Page 585
 Dealing with Exceptions......Page 587
 Summary......Page 588
 Exam Essentials......Page 589
 Review Questions......Page 591
Appendix A Answers to Review Questions......Page 599
 Chapter 1: Advanced Class Design......Page 600
 Chapter 2: Design Patterns and Principles......Page 602
 Chapter 3: Generics and Collections......Page 605
 Chapter 4: Functional Programming......Page 608
 Chapter 5: Dates, Strings, and Localization......Page 610
 Chapter 6: Exceptions and Assertions......Page 612
 Chapter 7: Concurrency......Page 613
 Chapter 8: IO......Page 617
 Chapter 9: NIO.2......Page 620
 Chapter 10: JDBC......Page 623
Appendix B Study Tips......Page 627
  Creating a Study Plan......Page 628
  Comparing Previous Exams......Page 630
  Creating and Running Sample Applications......Page 631
  Understanding the Question......Page 634
  Using the Provided Writing Material......Page 639
  Choosing the Best Answer......Page 642
  Optimizing Your Time......Page 643
  Getting a Good Night’s Rest......Page 645
Appendix C Upgrading from Java 6 or Earlier......Page 647
  Using the Diamond Operator......Page 648
  Creating Literals......Page 649
  Making Decisions with Switch......Page 650
  Using DateFormat......Page 655
  Formatting......Page 656
  Parsing......Page 657
  Custom Date Formats......Page 658
  Understanding the Lock Framework......Page 659
  Using a ReentrantLock......Page 662
  Understanding Read/Write Locks......Page 666
  Using a ReentrantReadWriteLock......Page 667
 Working with Directories......Page 669
  Traversing Directories......Page 670
  Monitoring a Directory for Changes......Page 677
 Exam Essentials......Page 685
 Review Questions......Page 687
 Answers to Practice Test......Page 697
Index......Page 701
Advert......Page 722
EULA......Page 723