book

Learning Java, 6th Edition

by Marc Loy, Patrick Niemeyer, Daniel Leuck

August 2023

Beginner

552 pages

15h 14m

English

O'Reilly Media, Inc.

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Preface
Who Should Read This BookNew DevelopmentsNew in This Edition (Java 15, 16, 17, 18, 19, 20, 21)Using This BookOnline ResourcesConventions Used in This BookUsing Code ExamplesO’Reilly Online LearningHow to Contact UsAcknowledgments
1. A Modern Language
Enter JavaJava’s OriginsGrowing UpA Virtual MachineJava Compared with Other LanguagesSafety of DesignSimplify, Simplify, Simplify…Type Safety and Method BindingIncremental DevelopmentDynamic Memory ManagementError HandlingThreadsScalabilitySafety of ImplementationThe VerifierClass LoadersApplication and User-Level SecurityA Java Road MapThe Past: Java 1.0–Java 20The Present: Java 21The FutureExercises
2. A First Application
Java Tools and EnvironmentInstalling the JDKInstalling IntelliJ IDEA and Creating a ProjectRunning the ProjectGrabbing the ExamplesHelloJavaClassesThe main() MethodClasses and ObjectsVariables and Class TypesHelloComponentInheritanceThe JComponent ClassRelationships and Finger-PointingPackages and ImportsThe paintComponent() MethodHelloJava2: The SequelInstance VariablesConstructorsEventsThe repaint() MethodInterfacesGoodbye and Hello AgainReview QuestionsCode Exercises
3. Tools of the Trade
JDK EnvironmentThe Java VMRunning Java ApplicationsSystem PropertiesThe ClasspathCLASSPATH on Unix and macOSCLASSPATH on WindowsCLASSPATH WildcardsModulesThe Java CompilerTrying JavaJAR FilesThe jar UtilityTool Wrap-UpReview QuestionsCode ExercisesAdvanced Code Exercises
4. The Java Language
Text EncodingCommentsJavadoc CommentsAnnotationsVariables and ConstantsTypesPrimitive TypesReference TypesA Word About StringsStatements and ExpressionsStatementsExpressionsArraysArray TypesArray Creation and InitializationUsing ArraysAnonymous ArraysMultidimensional ArraysTypes and Classes and Arrays, Oh My!Review QuestionsCode ExercisesAdvanced Exercises
5. Objects in Java
ClassesDeclaring and Instantiating ClassesAccessing Fields and MethodsStatic MembersMethodsLocal VariablesShadowingStatic MethodsInitializing Local VariablesArgument Passing and ReferencesWrappers for Primitive TypesMethod OverloadingObject CreationConstructorsWorking with Overloaded ConstructorsObject DestructionGarbage CollectionPackagesImporting ClassesCustom PackagesMember Visibility and AccessCompiling with PackagesAdvanced Class DesignSubclassing and InheritanceAbstract Classes and MethodsInterfacesInner ClassesAnonymous Inner ClassesOrganizing Content and Planning for FailureReview QuestionsCode ExercisesAdvanced Exercises
6. Error Handling
ExceptionsExceptions and Error ClassesException HandlingBubbling UpStack TracesChecked and Unchecked ExceptionsThrowing Exceptionstry CreepThe finally Clausetry with ResourcesPerformance IssuesAssertionsEnabling and Disabling AssertionsUsing AssertionsReal-World ExceptionsReview QuestionsCode ExercisesAdvanced Exercises
7. Collections and Generics
CollectionsThe Collection InterfaceCollection TypesThe Map InterfaceType LimitationsContainers: Building a Better MousetrapCan Containers Be Fixed?Enter GenericsTalking About Types“There Is No Spoon”ErasureRaw TypesParameterized Type RelationshipsWhy Isn’t a List<Date> a List<Object>?CastsConverting Between Collections and ArraysIteratorA Closer Look: The sort() MethodApplication: Trees on the FieldUseful FeaturesReview QuestionsCode ExercisesAdvanced Exercises
8. Text and Core Utilities
StringsConstructing StringsStrings from ThingsComparing StringsSearchingString Method SummaryThings from StringsParsing Primitive NumbersTokenizing TextRegular ExpressionsRegex NotationThe java.util.regex APIMath UtilitiesThe java.lang.Math ClassBig/Precise NumbersDates and TimesLocal Dates and TimesComparing and Manipulating Dates and TimesTime ZonesParsing and Formatting Dates and TimesFormatting Dates and TimesTimestampsOther Useful UtilitiesReview QuestionsCode Exercises
9. Threads
Introducing ThreadsThe Thread Class and the Runnable InterfaceControlling ThreadsRevisiting Animation with ThreadsDeath of a ThreadVirtual ThreadsPreview Feature TangentA Quick ComparisonSynchronizationSerializing Access to MethodsAccessing Class and Instance Variables from Multiple ThreadsScheduling and PriorityThread StateTime-SlicingPrioritiesThread PerformanceThe Cost of SynchronizationThread Resource ConsumptionVirtual Thread PerformanceConcurrency UtilitiesUpgrading Our Queue DemoStructured ConcurrencySo Many Threads to PullReview QuestionsCode Exercises

10. File Input and Output
StreamsBasic I/OCharacter StreamsStream WrappersThe java.io.File ClassFile StreamsRandomAccessFileThe New I/O File APIFileSystem and PathNIO File OperationsThe NIO PackageAsynchronous I/OPerformanceMapped and Locked FilesChannelsBuffersCharacter Encoders and DecodersFileChannelFileChannel Examplewrap() UpReview QuestionsCode ExercisesAdvanced Exercises
11. Functional Approaches in Java
Functions 101LambdasLambda ExpressionsFunctional InterfacesMethod ReferencesPractical Lambdas: SortingStreamsSources and OperationsFiltering StreamsMapping StreamsFlatmapsReducing and CollectingUsing Lambdas DirectlyNext StepsReview QuestionsCode ExercisesAdvanced Exercises
12. Desktop Applications
Buttons and Sliders and Text Fields, Oh My!Component HierarchiesModel View Controller ArchitectureLabels and ButtonsText ComponentsOther ComponentsContainers and LayoutsFrames and WindowsJPanelLayout ManagersEventsMouse EventsAction EventsChange EventsOther EventsThreading ConsiderationsSwingUtilities and Component UpdatesTimersBut Wait, There’s MoreMenusModals and Pop-UpsUser Interface and User ExperienceReview QuestionsCode ExercisesAdvanced Exercises
13. Network Programming in Java
Uniform Resource LocatorsThe URL ClassStream DataGetting the Content as an ObjectManaging ConnectionsTalking to Web ApplicationsUsing the GET MethodUsing the POST MethodThe HttpURLConnectionSSL and Secure Web CommunicationsNetwork ProgrammingSocketsClients and ServersThe DateAtHost ClientA Distributed GameMuch More to ExploreReview QuestionsCode ExercisesAdvanced Exercises
A. Code Examples and IntelliJ IDEA
Grabbing the Main Code ExamplesImporting the Examples
B. Exercise Answers
Chapter 1: A Modern LanguageChapter 2: A First ApplicationCode ExercisesChapter 3: Tools of the TradeCode ExercisesChapter 4: The Java LanguageCode ExercisesAdvanced ExercisesChapter 5: Objects in JavaCode ExercisesAdvanced ExercisesChapter 6: Error HandlingCode ExercisesAdvanced ExercisesChapter 7: Collections and GenericsCode ExercisesAdvanced ExercisesChapter 8: Text and Core UtilitiesCode ExercisesChapter 9: ThreadsCode ExercisesChapter 10: File Input and OutputCode ExercisesAdvanced ExercisesChapter 11: Functional Approaches in JavaCode ExercisesAdvanced ExercisesChapter 12: Desktop ApplicationsCode ExercisesAdvanced ExercisesChapter 13: Network Programming in JavaCode ExercisesAdvanced Exercises
Glossary
Index
About the Authors

Content preview from Learning Java, 6th Edition

About the Authors

Marc Loy caught the Java bug after seeing a beta copy of the HotJava browser showing a sorting algorithm animation back in 1994. He developed and delivered Java training classes at Sun Microsystems back in the day and has continued training a (much) wider audience ever since. He now spends his days consulting and writing on technical and media topics. He has also caught the maker bug and is exploring the fast-growing world of embedded electronics and wearables.

Patrick Niemeyer became involved with Oak (Java’s predecessor) while working at Southwestern Bell Technology Resources. He is the CTO of Ikayzo, Inc., and an independent consultant, and author. Pat is the creator of BeanShell, a popular Java scripting language. He has served as a member of several JCP expert groups that guided features of the Java language and is a contributor to many open source projects. Most recently, Pat has been developing analytics software for the financial industry as well as advanced mobile applications. He currently lives in St. Louis with his family and various creatures.

Dan Leuck is the CEO of Ikayzo, Inc., a Tokyo- and Honolulu-based interactive design and software development firm with customers that include Sony, Oracle, Nomura, PIMCO, and the federal government. He previously served as senior vice president of research and development for Tokyo-based ValueCommerce, Asia’s largest online marketing company; global head of development for London-based LastMinute.com, Europe’s ...

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Learning Java, 6th Edition

by Marc Loy, Patrick Niemeyer, Daniel Leuck

About the Authors

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.