Go for Java Programmers : Learn the Google Go Programming Language

Get an in-depth introduction to the Go programming language and its associated standard runtime libraries. This book is targeted towards programmers that already know the Java programming language and uses that Java knowledge to direct the learning of Go. You will get a deep understanding of the Go language and obtain a good introduction to the extensive Go standard libraries. This book teaches Go through clear descriptions of Go features, contrasting them with similar Java features and via providing extensive code examples. After reading this book you will be knowledgeable enough about Go and its libraries to begin doing effective programming using the Go language. Go for Java Programmers is structured more like a tutorial than a reference document. It covers key features of Go, but not every little detail as a reference might. Its goal is to get you competent enough in Go and its runtime that you can begin to effectively write Go programs. What You Will Learn Examine the key Go Runtime libraries and how they compare to Java libraries See when it is appropriate to use the Go language instead of the Java language Read and understand programs written in Go Write many programs in Go Determine when Go is an appropriate language to develop applications in Discover how the Go and Java languages and development experience compare and contrast Who This Book Is For Primarily existing professional Java programmers or students that already know something about Java. A basic understanding of Java is expected. Some basic programming experience with imperative languages is expected. Table of Contents About the Author About the Technical Reviewer Acknowledgments Introduction Assessments Part I: First Look at Go Chapter 1: A Brief Look at Go vs. Java Go Is a Compiled (vs. Interpreted, As Java Is) Language Go and Java Share Similar Program Structure Go and Java Have Some Code Style Differences That Influence How Code Is Structured Both Go and Java Are Procedural Languages Java Is an Object-Oriented (OO) Language, While Go Is Not Fully OO Java Is a Highly Functional Language, Go Is Less So Java Is a Highly Declarative Language, Go Is Less So Many Java Features Are Annotation Driven Go Does Not Support Exceptions Both Java and Go Use Managed Memory (Garbage Collectors) Go and Java Both Support Concurrency but in Different Ways Go’s Runtime Is Simpler Than the JRE The Go Program Build Process Is Different Go and Java Have Similar Release Cycles Chapter 2: What Java Has That Go Does Not Multiple Assignments Statements and Operators Assert Statement While and Do Statements Throw Statement/Throws Clause Strictfp, transient, volatile, synchronized, abstract, static Objects and Classes (OOP) and Inner Classes, Lambdas, this, super, Explicit Constructors Generic Types and Methods Extensive Functional Programming Capabilities Boxing of Primitive Values Source Annotations Multiple Visibilities Overloaded/Overridden Functions Formal Enums Built-in Binary Data Self-Serialization Concurrent Collections Chapter 3: A Deeper Comparison of Go and Java Part II: The Go Language Chapter 4: Key Go Aspects Simple Go Program Example Go Packages Go Comments Go Build/Run Process Go Playground Go Integrated Development Environments Running Go Programs Building Go Programs Bytecode vs. Real Code Go Command-Line Tools Tools Bundled in the Go Command Other Tools Go Runs Programs Instead of Classes Go Memory Management Go Identifiers Go Scopes Go Scopes vs. Go Source Files Initializing Go Variables Lifetimes of Go Identifiers Go Module Summary Go Assignments and Expressions Text Formatting in Go Goroutines Issues with Concurrency Go Concurrency Goroutines by Example Chapter 5: Go Basic Features Language Keywords Operators and Punctuation Go Operator Precedence Go Built-in Functions Chapter 6: Go Types Primitive/Built-in Types Numbers Characters and Strings Reference vs. Pointer Types Drill Down on Basic Data Types Boolean Type Integer Types Floating-Point Types When nil Can Go Wrong Programmer-Defined Types Arrays Slices Maps Functions Methods As Functions Any Declared Type Can Have Custom Functions Functions As Values Structs Structure Fields Structure Literals Nested Structures Structure Field Alignment Interfaces Application of Interfaces Composite Interfaces Channels Variable Declarations Constant Declarations Type Casting Type Testing Derived Type Declarations Chapter 7: Errors and Panics Go Errors Go Panics Errors and Panics Illustrated Chapter 8: Go Statements Package and Import Statements Assignment Statements Declaring Variables Declaring Named Constants If/Else Statements Switch Statement While Statement Do-While Statement For with Index Statement For over a Collection Statement Forever Statement Break and Continue Statements Goto Statement Return Statement Defer Statement Go Statement Select Statement Chapter 9: Applications for Interfaces An Interface Is the Key On Dependency Injection On Aspect-Oriented Programming Chapter 10: Go Unit Tests and Benchmarks Test Cases and Benchmarks in Go Test Cases in Java Chapter 11: Going into the Future Improved Error Handling Go Generics Capstone Game of Life Example Game of Life Go Source Capstone Project in Java Main.java Server.java Game.java Utility.java Formatter.java ParameterProvider.java AnnimatedGifWriter.java Logger.java Capstone Project in Go Main.go Server.go Game.go Utility.go Go Doc Output API Outputs Game Outputs Part III: Go Library Survey Chapter 12: Key Package Comparison Java Lang Packages Java IO Package Java Text Package Java Time Packages Java Util Packages Chapter 13: Key Method/Function Comparison Chapter 14: Go Package Survey File Access with Go Compression Services Archive Packages Compression Packages Image Input/Output (I/O) Bytes Package Format Package Data Collections Sorting Context Package Cryptography and Hashing and Data Encoding Encoding Packages Unicode Encoding Packages Chapter 15: SQL Database Access Chapter 16: Client and Server Support MIME Packages Network Packages The Net Package The HTTP Template Package The Net.HTTP Package URL Package Chapter 17: Go Runtime Errors Package Flag Package Log Package Math Package Operating System Support Packages Reflection Package Regular Expression Package Go Runtime Packages String Processing Packages Concurrency and Goroutines Testing Package Time and Date Package Appendix A: Installing Go Appendix B: Some Go FAQs Appendix C: Go Gotchas to Look Out For Appendix D: Mark-Sweep Pseudocode Appendix E: ASCII vs. UTF-8 Index