book

The Java Workshop

by David Cuartielles, Pradeep Kumar Gupta, Scott Cosentino, Andreas Göransson, Eric Foster-Johnson, Avinash Kate

October 2019

Beginner

606 pages

10h 37m

English

Packt Publishing

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About the BookAbout the ChaptersConventionsBefore You BeginInstallation of JREInstallation of JDKInstallation of IntelliJ IDEAInstalling the Code Bundle
IntroductionWriting, Compiling, and Executing Your Hello World ProgramExercise 1: Creating Your Hello World Program in JavaBasic Syntax and Naming ConventionsPrinting Out Different Data TypesVariables and Variable TypesExercise 2: Printing Different Types of DataPrimitive versus Reference Data TypesNullChars and StringsExercise 3: Declaring StringsDoing Some MathExercise 4: Solving a Simple Trigonometry ProblemComments Help You to Share CodeCLI versus GUIExercise 5: Running the Code from the CLIActivity 1: Obtaining the Minimum of Two NumbersSummary
IntroductionControlling the Flow of Your ProgramsExercise 1: Creating a Basic if StatementComparison OperatorsExercise 2: Using Java Comparison OperatorsNested if StatementsExercise 3: Implementing a Nested if StatementBranching Two Ways with if and elseExercise 4: Using if and else StatementsUsing Complex ConditionalsExercise 5: Using Logical Operators to Create Complex ConditionalsUsing Arithmetic Operators in an if ConditionThe Ternary OperatorExercise 6: Using the Ternary OperatorEquality Can Be TrickyExercise 7: Comparing Decimal ValuesComparing StringsUsing switch StatementsExercise 8: Using switchExercise 9: Allowing Cases to Fall ThroughUsing Java 12 Enhanced switch StatementsExercise 10: Using Java 12 switch StatementsLooping and Performing Repetitive TasksLooping with the for LoopExercise 11: Using a Classic for LoopExercise 12: Using an Enhanced for LoopJumping Out of Loops with Break and ContinueExercise 13: Using break and continueUsing the while LoopExercise 14: Using a while LoopUsing the do-while LoopHandling Command-Line ArgumentsExercise 15: Testing Command-Line ArgumentsConverting Command-Line ArgumentsExercise 16: Converting String to Integers and DoublesDiving Deeper into Variables — ImmutabilityComparing Final and ImmutableUsing Static ValuesUsing Local Variable Type InferenceActivity 1: Taking Input and Comparing RangesSummary
IntroductionThe Anatomy of a ClassWorking with Objects in JavaChecking the Precedence of a Class with instanceofExercise 1: Creating the WordTool ClassActivity 1: Adding the Frequency-of-Symbol Calculation to WordToolInheritance in JavaOverriding and Hiding MethodsAvoiding Overriding: Final Classes and MethodsOverloading Methods and ConstructorsRecursionAnnotationsInterfacesInner ClassesDocumenting with JavaDocActivity 2: Adding Documentation to WordToolSummary
IntroductionArraysActivity 1: Searching for Multiple Occurrences in an ArraySetsListsExercise 1: Creating the AnalyzeInput ApplicationMapsIterating through CollectionsExercise 2: Bringing Analytics into the AnalyzeInput ApplicationSorting CollectionsExercise 3: Sort the Results from the AnalyzeInput ApplicationPropertiesActivity 2: Iterating through Large ListsSummary
IntroductionA Simple Exception ExampleNullPointerException – Have No FearCatching ExceptionsExercise 1: Logging ExceptionsThrows and ThrowExercise 2: Breaking the Law (and Fixing It)The finally BlockActivity 1: Designing an Exception Class Logging DataBest Practices for Handling ExceptionsWhere Do Exceptions Come from?Summary
IntroductionOrganizing Code into PackagesImporting ClassesExercise 1: Importing ClassesFully Qualified Class NamesImporting All Classes in a PackageDealing with Duplicated NamesStatic ImportsCreating a PackageNaming Your PackageDirectories and PackagesExercise 2: Creating a Package for a Fitness Tracking AppBuilding JAR FilesExercise 3: Building a JAR FileDefining the ManifestExercise 4: Building an Executable JAR FileBuild ToolsMavenExercise 5: Creating a Maven ProjectExercise 6: Adding Java Sources to the Maven ProjectExercise 7: Building the Maven ProjectExercise 8: Creating an Executable JAR with MavenUsing GradleExercise 9: Creating a Gradle ProjectExercise 10: Building an Executable JAR with GradleUsing Third-Party LibrariesFinding the LibrariesAdding a Project DependencyExercise 11: Adding a Third-Party Library DependencyUsing the Apache Commons Lang LibraryExercise 12: Using the Apache Commons Lang LibraryUsing ModulesCreating ModulesExercise 13: Creating a Project for a ModuleExercise 14: Creating a Second Module Using the First OneActivity 1: Tracking Summer High TemperaturesSummary
IntroductionRelational DatabasesRelational Database Management SystemsInstalling a DatabaseExercise 1: Running the H2 DatabaseIntroducing SQLExercise 2: Creating the customer TableInserting Data into a TableExercise 3: Inserting DataRetrieving DataRelating TablesExercise 4: Creating the email TableSelecting Data from Multiple TablesModifying Existing RowsExercise 5: Modifying email DataDeleting DataJDBC—Accessing Databases from JavaConnecting to DatabasesQuerying Data with JDBCExercise 6: Querying Data with JDBCSanitizing User InputUsing Prepared StatementsTransactions and RollbackExercise 7: Using Prepared Statements with TransactionsSimplifying JDBC ProgrammingUsing Object-Relational Mapping SoftwareDatabase Connection PoolingNon-Relational, or NoSQL, DatabasesActivity 1: Track Your ProgressSummary
IntroductionListing Files and DirectoriesSeparating Directories from FilesExercise 1: Listing the Contents of SubdirectoriesCreating and Writing to a FileActivity 1: Writing the Directory Structure to a FileReading an Existing FileReading a Properties FileExercise 2: Creating a Properties File from the CLIWhat are Streams?The Different Streams of the Java LanguageWhat are Sockets?Creating a SocketServerWriting Data on and Reading Data from a SocketActivity 2: Improving the EchoServer and EchoClient ProgramsBlocking and Non-Blocking CallsSummary
IntroductionExploring HTTPHTTP Request MethodsRepresentational State TransferRequest HeadersUsing HttpUrlConnectionExercise 1: Creating a HEAD RequestReading the Response Data with a GET RequestExercise 2: Creating a GET RequestDealing with Slow ConnectionsRequesting ParametersHandling RedirectsCreating HTTP POST RequestsExercise 3: Sending JSON Data with POST RequestsParsing HTML DataExercise 4: Using jsoup to Extract Data from HTMLDelving into the java.net.http ModuleExercise 5: Getting HTML Contents Using the java.net.http ModuleActivity 1: Using the jsoup Library to Download Files from the WebSummary

IntroductionPlaintextCiphertextCiphersKeysSymmetric Key EncryptionExercise 1: Encrypting the String Using Advanced Encryption StandardBlock CiphersInitialization VectorsStream CiphersAsymmetric Key EncryptionExercise 2: Encrypting the String Using the RSA Asymmetric Key EncryptionEncrypting FilesExercise 3: Encrypting a FileSummary
IntroductionLaunching a ProcessSending Input to a Child ProcessCapturing the Output of a Child ProcessStoring the Output of a Child Process in a FileActivity 1: Making a Parent Process to Launch a Child ProcessSummary
IntroductionDecrypting Regular ExpressionsCharacter ClassesCharacter SetsQuantifiersAnchorsCapturing GroupsEscaped CharactersFlagsExercise 1: Implementing Regular Expressions Activity 1: Regular Expressions to Check If the Entrance is Entered in the Desired FormatRegular Expressions in JavaExercise 2: Extracting the Domain Using Pattern MatchingExercise 3: Extracting Links Using Pattern MatchingSummary
IntroductionBackgroundFunctional ProgrammingSide EffectsDeterministic FunctionsPure FunctionsExercise 1: Writing Pure Functions Immutability of StateExercise 2: Creating an Immutable ClassActivity 1: Modifying Immutable ListsImmutable CollectionsExercise 3: Overriding the String MethodFunctional InterfacesLambda ExpressionsExercise 4: Listing Spare TiresSummary
IntroductionDelving into RecursionExercise 1: Using Recursion to Overflow the StackTrying Tail RecursionExercise 2: Using Recursion to Calculate FactorialsProcessing an XML DocumentExercise 3: Creating an XML FileIntroducing the DOM XML APIExercise 4: Traversing an XML DocumentActivity 1: Calculating the Fibonacci SequenceSummary
IntroductionCreating StreamsParallel StreamsEncounter OrderClosing StreamsTerminal OperationsIntermediate OperationsExercise 1: Using the Stream APIActivity 1: Applying Discount on the ItemsUsing CollectorsI/O StreamsExercise 2: Converting CSV to a ListActivity 2: Searching for SpecificsSummary
IntroductionPredicate InterfaceExercise 1: Defining a predicateActivity 1: Toggling the Sensor StatesConsumer InterfaceExercise 2: Producing Side EffectsFunctionExercise 3: Extracting DataActivity 2: Using a Recursive FunctionActivity 3: Using a Lambda FunctionSummary
IntroductionPublisherSubmissionPublisherSubscriberSubscriptionExercise 1: A Simple Application with a Single Publisher and a Single SubscriberProcessorExercise 2: Using a Processor to Convert a Stream of Strings to NumbersActivity 1: Let NumberProcessor Format Values as IntegersSummary
IntroductionGetting Started with Unit TestsIntroducing JUnitWriting Unit Tests with JUnitExercise 1: Writing a First Unit TestExercise 2: Writing a Successful TestDeciding What to TestWriting Parameterized TestsExercise 3: Writing a Parameterized TestWhen Tests Won't Work—Disabling TestsTest SetupExercise 4: Using Test Setup and Cleanup MethodsMockingTesting with Mocks Using MockitoExercise 5: Using Mocks when TestingActivity 1: Counting the Words in the StringSummary
1. Getting StartedActivity 1: Obtaining the Minimum of Two Numbers2. Learning the BasicsActivity 1: Taking Input and Comparing Ranges3. Object-Oriented ProgrammingActivity 1: Adding the Frequency-of-Symbol Calculation to WordToolActivity 2: Adding Documentation to WordTool4. Collections, List, and Java's Built-In APIsActivity 1: Searching for Multiple Occurrences in an ArrayActivity 2: Iterating through Large Lists5. ExceptionsActivity 1: Designing an Exception Class Logging Data6. Libraries, Packages, and ModulesActivity 1: Tracking Summer High Temperatures7. Databases and JDBCActivity 1: Track Your Progress8. Sockets, Files, and StreamsActivity 1: Writing the Directory Structure to a FileActivity 2: Improving the EchoServer and EchoClient Programs9. Working with HTTPActivity 1: Using the jsoup Library to Download Files from the Web11. ProcessesActivity 1: Making a Parent Process to Launch a Child Process12. Regular ExpressionsActivity 1: Regular Expressions to Check If the Entrance is Entered in the Desired Format13. Functional Programming with Lambda ExpressionsActivity 1: Modifying Immutable Lists14. RecursionActivity 1: Calculating the Fibonacci Sequence15. Processing Data with StreamsActivity 1: Applying Discount on the ItemsActivity 2: Searching for Specifics16. Predicates and Other Functional InterfacesActivity 1: Toggling the Sensor StatesActivity 2: Using a Recursive FunctionActivity 3: Using a Lambda Function17. Reactive Programming with Java FlowActivity 1: Let NumberProcessor Format Values as Integers18. Unit TestingActivity 1: Counting the Words in the String
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