Java Cookbook: Problems and Solutions for Java Developers, 4th Edition

Preface
    Who This Book Is For
    What’s in This Book?
    Java Books
    Conventions Used in This Book
    O’Reilly Online Learning
    Comments and Questions
    Acknowledgments
1. Getting Started: Compiling and Running Java
    1.0. Introduction
    1.1. Compiling and Running Java: Standard JDK
    1.2. Compiling and Running Java: GraalVM for Better Performance
    1.3. Compiling, Running, and Testing with an IDE
    1.4. Exploring Java with JShell
    1.5. Using CLASSPATH Effectively
    1.6. Downloading and Using the Code Examples
    1.7. Automating Dependencies, Compilation, Testing, and Deployment with Apache Maven
    1.8. Automating Dependencies, Compilation, Testing, and Deployment with Gradle
    1.9. Dealing with Deprecation Warnings
    1.10. Maintaining Code Correctness with Unit Testing: JUnit
    1.11. Maintaining Your Code with Continuous Integration
    1.12. Getting Readable Stack Traces
    1.13. Finding More Java Source Code
    1.14. Finding Runnable Java Libraries
2. Interacting with the Environment
    2.0. Introduction
    2.1. Getting Environment Variables
    2.2. Getting Information from System Properties
    2.3. Dealing with Code That Depends on the Java Version or the Operating System
    2.4. Using Extensions or Other Packaged APIs
    2.5. Using the Java Modules System
3. Strings and Things
    3.0. Introduction
    3.1. Taking Strings Apart with Substrings or Tokenizing
    3.2. Putting Strings Together with StringBuilder
    3.3. Processing a String One Character at a Time
    3.4. Aligning, Indenting, and Unindenting Strings
    3.5. Converting Between Unicode Characters and Strings
    3.6. Reversing a String by Word or by Character
    3.7. Expanding and Compressing Tabs
    3.8. Controlling Case
    3.9. Entering Nonprintable Characters
    3.10. Trimming Blanks from the End of a String
    3.11. Creating a Message with I18N Resources
    3.12. Using a Particular Locale
    3.13. Creating a Resource Bundle
    3.14. Program: A Simple Text Formatter
    3.15. Program: Soundex Name Comparisons
4. Pattern Matching with Regular Expressions
    4.0. Introduction
    4.1. Regular Expression Syntax
    4.2. Using Regexes in Java: Test for a Pattern
    4.3. Finding the Matching Text
    4.4. Replacing the Matched Text
    4.5. Printing All Occurrences of a Pattern
    4.6. Printing Lines Containing a Pattern
    4.7. Controlling Case in Regular Expressions
    4.8. Matching Accented, or Composite, Characters
    4.9. Matching Newlines in Text
    4.10. Program: Apache Logfile Parsing
    4.11. Program: Full Grep
5. Numbers
    5.0. Introduction
    5.1. Checking Whether a String Is a Valid Number
    5.2. Converting Numbers to Objects and Vice Versa
    5.3. Taking a Fraction of an Integer Without Using Floating Point
    5.4. Working with Floating-Point Numbers
    5.5. Formatting Numbers
    5.6. Converting Among Binary, Octal, Decimal, and Hexadecimal
    5.7. Operating on a Series of Integers
    5.8. Formatting with Correct Plurals
    5.9. Generating Random Numbers
    5.10. Multiplying Matrices
    5.11. Using Complex Numbers
    5.12. Handling Very Large Numbers
    5.13. Program: TempConverter
    5.14. Program: Number Palindromes
6. Dates and Times
    6.0. Introduction
    6.1. Finding Today’s Date
    6.2. Formatting Dates and Times
    6.3. Converting Among Dates/Times, YMDHMS, and Epoch Seconds
    6.4. Parsing Strings into Dates
    6.5. Difference Between Two Dates
    6.6. Adding to or Subtracting from a Date
    6.7. Handling Recurring Events
    6.8. Computing Dates Involving Time Zones
    6.9. Interfacing with Legacy Date and Calendar Classes
7. Structuring Data with Java
    7.0. Introduction
    7.1. Using Arrays for Data Structuring
    7.2. Resizing an Array
    7.3. The Collections Framework
    7.4. Like an Array, but More Dynamic
    7.5. Using Generic Types in Your Own Class
    7.6. How Shall I Iterate Thee? Let Me Enumerate the Ways
    7.7. Eschewing Duplicates with a Set
    7.8. Structuring Data in a Linked List
    7.9. Mapping with Hashtable and HashMap
    7.10. Storing Strings in Properties and Preferences
    7.11. Sorting a Collection
    7.12. Avoiding the Urge to Sort
    7.13. Finding an Object in a Collection
    7.14. Converting a Collection to an Array
    7.15. Making Your Data Iterable
    7.16. Using a Stack of Objects
    7.17. Multidimensional Structures
    7.18. Simplifying Data Objects with Lombok or Record
    7.19. Program: Timing Comparisons
8. Object-Oriented Techniques
    8.0. Introduction
    8.1. Object Methods: Formatting Objects with toString(), Comparing with Equals
    8.2. Using Inner Classes
    8.3. Providing Callbacks via Interfaces
    8.4. Polymorphism/Abstract Methods
    8.5. Using Typesafe Enumerations
    8.6. Avoiding NPEs with Optional
    8.7. Enforcing the Singleton Pattern
    8.8. Roll Your Own Exceptions
    8.9. Using Dependency Injection
    8.10. Program: Plotter
9. Functional Programming Techniques: Functional Interfaces, Streams, and Parallel Collections
    9.0. Introduction
    9.1. Using Lambdas/Closures Instead of Inner Classes
    9.2. Using Lambda Predefined Interfaces Instead of Your Own
    9.3. Simplifying Processing with Streams
    9.4. Simplifying Streams with Collectors
    9.5. Improving Throughput with Parallel Streams and Collections
    9.6. Using Existing Code as Functional with Method References
    9.7. Java Mixins: Mixing in Methods
10. Input and Output: Reading, Writing, and Directory Tricks
    10.0. Introduction
    10.1. About InputStreams/OutputStreams and Readers/Writers
    10.2. Reading a Text File
    10.3. Reading from the Standard Input or from the Console/Controlling Terminal
    10.4. Printing with Formatter and printf
    10.5. Scanning Input with StreamTokenizer
    10.6. Scanning Input with the Scanner Class
    10.7. Scanning Input with Grammatical Structure
    10.8. Copying a File
    10.9. Reassigning the Standard Streams
    10.10. Duplicating a Stream as It Is Written; Reassigning Standard Streams
    10.11. Reading/Writing a Different Character Set
    10.12. Those Pesky End-of-Line Characters
    10.13. Beware Platform-Dependent File Code
    10.14. Reading/Writing Binary Data
    10.15. Reading and Writing JAR or ZIP Archives
    10.16. Finding Files in a Filesystem-Neutral Way with getResource() and getResourceAsStream()
    10.17. Getting File Information: Files and Path
    10.18. Creating a New File or Directory
    10.19. Changing a File’s Name or Other Attributes
    10.20. Deleting a File
    10.21. Creating a Transient/Temporary File
    10.22. Listing a Directory
    10.23. Getting the Directory Roots
    10.24. Using the FileWatcher Service to Get Notified About File Changes
    10.25. Program: Save User Data to Disk
    10.26. Program: Find—Walking a File Tree
11. Data Science and R
    11.1. Machine Learning with Java
    11.2. Using Data In Apache Spark
    11.3. Using R Interactively
    11.4. Comparing/Choosing an R Implementation
    11.5. Using R from Within a Java App: Renjin
    11.6. Using Java from Within an R Session
    11.7. Using FastR, the GraalVM Implementation of R
    11.8. Using R in a Web App
12. Network Clients
    12.0. Introduction
    12.1. HTTP/REST Web Client
    12.2. Contacting a Socket Server
    12.3. Finding and Reporting Network Addresses
    12.4. Handling Network Errors
    12.5. Reading and Writing Textual Data
    12.6. Reading and Writing Binary or Serialized Data
    12.7. UDP Datagrams
    12.8. URI, URL, or URN?
    12.9. Program: TFTP UDP Client
    12.10. Program: Sockets-Based Chat Client
    12.11. Program: Simple HTTP Link Checker
13. Server-Side Java
    13.0. Introduction
    13.1. Opening a Server Socket for Business
    13.2. Finding Network Interfaces
    13.3. Returning a Response (String or Binary)
    13.4. Returning Object Information Across a Network Connection
    13.5. Handling Multiple Clients
    13.6. Serving the HTTP Protocol
    13.7. Securing a Web Server with SSL and JSSE
    13.8. Creating a REST Service with JAX-RS
    13.9. Network Logging
    13.10. Setting Up SLF4J
    13.11. Network Logging with Log4j
    13.12. Network Logging with java.util.logging
14. Processing JSON Data
    14.0. Introduction
    14.1. Generating JSON Directly
    14.2. Parsing and Writing JSON with Jackson
    14.3. Parsing and Writing JSON with org.json
    14.4. Parsing and Writing JSON with JSON-B
    14.5. Finding JSON Elements with JSON Pointer
15. Packages and Packaging
    15.0. Introduction
    15.1. Creating a Package
    15.2. Documenting Classes with Javadoc
    15.3. Beyond Javadoc: Annotations/Metadata
    15.4. Preparing a Class as a JavaBean
    15.5. Archiving with JAR
    15.6. Running a Program from a JAR
    15.7. Packaging Web Tier Components into a WAR File
    15.8. Creating a Smaller Distribution with jlink
    15.9. Using JPMS to Create a Module
16. Threaded Java
    16.0. Introduction
    16.1. Running Code in a Different Thread
    16.2. Displaying a Moving Image with Animation
    16.3. Stopping a Thread
    16.4. Rendezvous and Timeouts
    16.5. Synchronizing Threads with the synchronized Keyword
    16.6. Simplifying Synchronization with Locks
    16.7. Simplifying Producer/Consumer with the Queue Interface
    16.8. Optimizing Parallel Processing with Fork/Join
    16.9. Scheduling Tasks: Future Times, Background Saving in an Editor
17. Reflection, or “A Class Named Class”
    17.0. Introduction
    17.1. Getting a Class Descriptor
    17.2. Finding and Using Methods and Fields
    17.3. Accessing Private Methods and Fields via Reflection
    17.4. Loading and Instantiating a Class Dynamically
    17.5. Constructing a Class from Scratch with a ClassLoader
    17.6. Constructing a Class from Scratch with JavaCompiler
    17.7. Performance Timing
    17.8. Printing Class Information
    17.9. Listing Classes in a Package
    17.10. Using and Defining Annotations
    17.11. Finding Plug-In-Like Classes via Annotations
    17.12. Program: CrossRef
18. Using Java with Other Languages
    18.0. Introduction
    18.1. Running an External Program from Java
    18.2. Running a Program and Capturing Its Output
    18.3. Calling Other Languages via javax.script
    18.4. Mixing Languages with GraalVM
    18.5. Marrying Java and Perl
    18.6. Calling Other Languages via Native Code
    18.7. Calling Java from Native Code
Afterword
Java Then and Now
    Introduction: Always in Motion the Java Is
    What Was New in Java 8
    What Was New in Java 9
    What Was New in Java 10 (March 2018)
    What Was New in Java 11 (September 2018)
    What Was New in Java 12 (March 2019)
    What Is New in Java 13 (September 2019)
    Looking Ahead
Index