Learn Java 17 Programming: Learn the fundamentals of Java Programming with this updated guide with the latest features. 2 Ed

Cover....1 Title Page....2 Copyright and Credits....2 Contributors....4 Table of Contents....8 Preface....18 Part 1: Overview of Java Programming....26 Chapter 1: Getting Started with Java 17....28 Technical requirements....29 How to install and run Java....29 What is the JDK and why do we need it?....30 Installing Java SE....32 Commands, tools, and utilities....32 How to install and run an IDE....33 Selecting an IDE....34 Installing and configuring IntelliJ IDEA....35 Creating a project....36 Importing a project....42 Executing examples from the command line....47 Java primitive types and operators....48 Boolean types....48 Numeric types....49 Default values of primitive types....52 Literals of primitive types....53 New compact number format....56 Operators....57 String types and literals....62 String literals....63 String immutability....66 IDs and variables....66 ID....67 Variable declaration (definition) and initialization....67 Java statements....68 Expression statements....70 Control flow statements....71 Summary....84 Quiz....84 Chapter 2: Java Object-Oriented Programming (OOP)....90 Technical requirements....91 OOP concepts....92 Object/class....92 Inheritance....93 Abstraction/interface....94 Encapsulation....95 Polymorphism....96 Class....96 Method....98 Constructor....100 The new operator....103 Class java.lang.Object....105 Instance and static properties and methods....110 Interface....112 Default methods....113 Private methods....115 Static fields and methods....116 Interface versus abstract class....116 Overloading, overriding, and hiding....117 Overloading....117 Overriding....119 Hiding....121 The final variable, method, and classes....125 The final variable....125 Final method....127 Final class....128 The record class....128 Sealed classes and interfaces....130 Polymorphism in action....134 The object factory....134 The instanceof operator....137 Summary....139 Quiz....139 Chapter 3: Java Fundamentals....144 Technical requirements....145 Packages, importing, and access....145 Packages....145 Importing ....146 Access modifiers....148 Java reference types....152 Class and interface....152 Array....153 Enum....155 Default values and literals ....158 A reference type as a method parameter....158 equals() method ....161 Reserved and restricted keywords....164 Reserved keywords....164 Reserved identifiers....165 Reserved words for literal values....165 Restricted keywords....165 Usage of the this and super keywords....166 Usage of the this keyword....166 Usage of the super keyword ....168 Converting between primitive types....169 Widening conversion....169 Narrowing conversion....170 Methods of conversion....171 Converting between primitive and reference types....174 Boxing....174 Unboxing....175 Summary....176 Quiz....177 Part 2: Building Blocks of Java....180 Chapter 4: Exception Handling....182 Technical requirements....183 The Java exceptions framework....183 Checked and unchecked exceptions....185 The try, catch, and finally blocks....187 The throws statement....190 The throw statement....192 The assert statement....193 Best practices of exception handling....193 Summary....194 Quiz....195 Chapter 5: Strings, Input/Output, and Files....198 Technical requirements....199 String processing....199 Methods of the String class ....199 String utilities....206 I/O streams....209 Stream data....210 The InputStream class and its subclasses....211 The OutputStream class and its subclasses....222 The Reader and Writer classes and their subclasses....226 Other classes of the java.io package....228 The java.util.Scanner class....238 File management....241 Creating and deleting files and directories....241 Listing files and directories....244 Apache Commons’ FileUtils and IOUtils utilities ....245 The FileUtils class....246 The IOUtils class....247 Summary....247 Quiz....248 Chapter 6: Data Structures, Generics, and Popular Utilities....252 Technical requirements....253 List, Set, and Map interfaces....253 Generics....254 How to initialize List and Set....255 java.lang.Iterable interface....259 Collection interface....260 List interface....263 Set interface ....266 Map interface....267 Unmodifiable collections....270 Collections utilities....271 java.util.Collections class....272 CollectionUtils class....274 Arrays utilities....276 java.util.Arrays class....276 ArrayUtils class....278 Objects utilities....279 java.util.Objects class....279 ObjectUtils class....284 The java.time package....285 LocalDate class....285 LocalTime class....289 LocalDateTime class....291 Period and Duration classes....292 Period of day....294 Summary....295 Quiz....295 Chapter 7: Java Standard and External Libraries....302 Technical requirements....303 Java Class Library (JCL)....303 java.lang....304 java.util....305 java.time....306 java.io and java.nio....307 java.sql and javax.sql....307 java.net....307 java.lang.math and java.math....308 java.awt, javax.swing, and javafx....308 External libraries....309 org.junit....309 org.mockito....311 org.apache.log4j and org.slf4j....312 org.apache.commons....315 Summary....320 Quiz....320 Chapter 8: Multithreading and Concurrent Processing....324 Technical requirements....325 Thread versus process....325 User thread versus daemon....326 Extending the Thread class....326 Implementing the Runnable interface....328 Extending Thread versus implementing Runnable....330 Using a pool of threads....331 Getting results from a thread....339 Parallel versus concurrent processing....346 Concurrent modification of the same resource....346 Atomic variable....350 Synchronized method....353 Synchronized block....354 Concurrent collections ....355 Addressing memory consistency errors....358 Summary....358 Quiz....359 Chapter 9: JVM Structure and Garbage Collection....362 Technical requirements....363 Java application execution....363 Using an IDE....363 Using the command line with classes....369 Using the command line with JAR files....370 Using the command line with an executable JAR file....371 Java processes ....372 Classloading....375 Class linking....376 Class initialization....377 Class instantiation....377 Method execution....378 Garbage collection....378 Application termination....378 JVM’s structure....380 Runtime data areas....380 Classloaders....381 Execution engine....381 Garbage collection....382 Responsiveness, throughput, and stop-the-world....382 Object age and generation....383 When stop-the-world is unavoidable....383 Summary....384 Quiz....384 Chapter 10: Managing Data in a Database....388 Technical requirements....389 Creating a database....389 Creating a database structure....391 Connecting to a database....394 Releasing the connection....397 CRUD data....398 The INSERT statement....398 The SELECT statement....399 The UPDATE statement....400 The DELETE statement....401 Using statements....401 Using PreparedStatement....408 Using CallableStatement....410 Using a shared library JAR file to access a database....412 Summary....417 Quiz....417 Chapter 11: Network Programming....422 Technical requirements....423 Network protocols....423 UDP-based communication....424 TCP-based communication....429 The java.net.ServerSocket class....430 The java.net.Socket class....433 Running the examples....435 UDP versus TCP protocols....437 URL-based communication....438 The URL syntax....438 The java.net.URL class....439 Using the HTTP 2 Client API....449 Blocking HTTP requests....451 Non-blocking (asynchronous) HTTP requests....453 Server push functionality....459 WebSocket support....461 Summary....463 Quiz....464 Chapter 12: Java GUI Programming....466 Technical requirements....467 Java GUI technologies....467 JavaFX fundamentals....468 HelloWorld with JavaFX....472 Control elements....475 Charts....479 Applying CSS....481 Using FXML....483 Embedding HTML....493 Playing media....503 Adding effects....509 Summary....535 Quiz....535 Part 3: Advanced Java....536 Chapter 13: Functional Programming....538 Technical requirements....539 What is functional programming?....539 What is a functional interface?....542 What is a Lambda expression?....544 Standard functional interfaces....548 Consumer....548 Predicate....550 Supplier....552 Function....553 Other standard functional interfaces....556 Lambda expression limitations....557 Method references....559 Summary....562 Quiz....563 Chapter 14: Java Standard Streams....564 Technical requirements....565 Streams as a source of data and operations....565 Stream initialization....567 Stream interface....567 The Stream.Builder interface....572 Other classes and interfaces....574 Operations (methods)....576 Intermediate operations....578 Terminal operations....582 Numeric stream interfaces....606 Creating a stream....607 Intermediate operations....607 Terminal operations....611 Parallel streams....612 Stateless and stateful operations....612 Sequential or parallel processing?....613 Summary....616 Quiz....617 Chapter 15: Reactive Programming....620 Technical requirements....621 Asynchronous processing....621 Sequential and parallel streams....622 Using the CompletableFuture object....624 Non-blocking APIs....625 The java.io package versus the java.nio package....625 The event/run loop....626 Reactive....627 Responsive....628 Resilient....628 Elastic....629 Message-driven....629 Reactive streams....630 RxJava....631 Observable types....634 Disposable....643 Creating an observable....645 Operators....647 Multithreading (scheduler)....659 Summary....666 Quiz....666 Chapter 16: Java Microbenchmark Harness....668 Technical requirements....669 What is JMH?....669 Creating a JMH benchmark....672 Running the benchmark....674 Using an IDE plugin....674 JMH benchmark parameters....677 Mode....677 Output time unit....678 Iterations....678 Forking....678 JMH usage examples....679 Using the @State annotation....681 Using the Blackhole object....682 Using the @CompilerControl annotation....683 Using the @Param annotation....683 A word of caution....684 Summary....685 Quiz....685 Chapter 17: Best Practices for Writing High-Quality Code....688 Technical requirements....689 Java idioms, their implementation, and their usage....689 The equals() and hashCode() methods....690 The compareTo() method....693 The clone() method....695 The StringBuffer and StringBuilder classes....701 The try, catch, and finally clauses....701 Best design practices....701 Identifying loosely coupled functional areas....702 Breaking the functional area into traditional tiers....702 Coding to an interface....702 Using factories....703 Preferring composition over inheritance....703 Using libraries....703 Code is written for people....704 Use well-established frameworks and libraries....705 Testing is the shortest path to quality code....712 Summary....712 Quiz....713 Assessments....714 Chapter 1 – Getting Started with Java 17....714 Chapter 2 – Java Object-Oriented Programming (OOP)....715 Chapter 3 – Java Fundamentals....715 Chapter 4 – Exception Handling....716 Chapter 5 – Strings, Input/Output, and Files....716 Chapter 6 – Data Structures, Generics, and Popular Utilities....717 Chapter 7 – Java Standard and External Libraries....717 Chapter 8 – Multithreading and Concurrent Processing....718 Chapter 9 – JVM Structure and Garbage Collection....719 Chapter 10 – Managing Data in a Database....719 Chapter 11 – Network Programming....720 Chapter 12 – Java GUI Programming....721 Chapter 13 – Functional Programming....721 Chapter 14 – Java Standard Streams....722 Chapter 15 – Reactive Programming....722 Chapter 16 – Java Microbenchmark Harness....723 Chapter 17 – Best Practices for Writing High-Quality Code....724 Index....726 Other Books You May Enjoy....745