Exploring Java 25

Introduction

1. Install Java 25
2. Build Tools
3. Source Code
4. Java Language

Records

1. Value Objects
2. Alternatives
3. Use Records

Sealed Classes

1. Inheritance in Java
2. Sealed Classes
3. Sealed Interfaces
4. Sealed and Record Classes
5. Reflection API
6. Class File Changes

Switch Expressions

1. Problems with switch Statement
2. Switch Expression
3. Arrow Labels

Text Blocks

1. Text Blocks
2. Re-indentation
3. Escape Sequences
4. New String Methods

Code Snippets in Java API Documentation

1. Inline Snippets
2. External Snippets
3. Markup Tags
4. Tag References

Module Import Declarations

1. Module Import Declaration
2. Import Ambiguity
3. Choose Import Declaration

Flexible Constructor Bodies

Compact Source Files and Instance Main Methods

1. Instance main methods
2. Compact Source Files
3. IO

Pattern Matching

1. Pattern Matching for instanceof
2. Pattern Matching for switch
3. Record Patterns
4. Unnamed Variables & Patterns
5. Primitive Types in Patterns, instanceof, and switch
6. Core Library

JVM Constants API

1. Loadable Constants
2. Constants API

Hidden Classes

1. Create Hidden Classes
2. Class Loading of Hidden Classes
3. Unloading of Hidden Classes
4. Stack Traces
5. Nest-based Access Control

Unix-Domain Socket Channels

Enhanced Pseudo-Random Number Generators

1. Edwards-Curve Digital Signature Algorithm (EdDSA)

Context-Specific Deserialization Filters

UTF-8 By Default

Internet-Address Resolution SPI

Simple Web Server

Sequenced Collections

1. SequencedCollection
2. SequencedSet
3. SequencedMap
4. Classes Hierarchy

Key Encapsulation Mechanism API

Stream Gatherers

Permanently Disable the Security Manager

Class-File API

1. ClassFile
2. Models
3. Builders
4. Transform
5. Parse
6. Generate
7. Transform

Integrity by Default

1. Prepare to Restrict the Use of JNI
2. Warn upon Use of Memory-Access Methods in sun.misc.Unsafe
3. Multi-threading

Virtual Threads

1. Create Virtual Threads
2. Virtual Threads Basics
3. Thread-local Variables
4. Scheduling of Virtual Threads
5. Execution of Virtual Threads
6. ExecutorService
7. Debugging

Scoped Values

1. Thread Local
2. ScopedValue

Structured Concurrency

1. Basic Usage
2. Joiner
3. Configuration
4. Open a StructuredTaskScope
5. Exception Handling
6. A Concrete Example
7. Joiner.allSuccessfulOrThrow
8. Joiner.anySuccessfulResultOrThrow
9. Close of StructuredTaskScope

Synchronize Virtual Threads without Pinning

Stable Values

1. StableValue
2. Stable Supplier
3. Stable IntFunction
4. Stable Function
5. Stable List
6. Stable Map
7. Constant Folding Optimization
8. Use StableValue
9. Project Panama

Foreign Function & Memory API

1. Foreign Memory
2. Memory Segments
3. Arenas
4. Dereferencing Memory Segments
5. Memory Layouts
6. Dereferencing Memory Layouts
7. More About Arenas
8. Foreign Functions
9. Security

Vector API

1. API Basics
2. Euclidean Distance Calculation
3. JVM

Class-Data Sharing

Helpful NullPointExceptions

JFR

1. JFR Event Streaming
2. Method Timing and Tracing
3. CPU-Time Profiling

Garbage Collectors

1. G1
2. ZGC
3. Generational Shenandoah

Compact Object Headers

Project Leyden

1. Class Loading & Linking
2. Method Profiling
3. Tools

Packaging Tool

1. Use jpackage
2. Custom Runtime Image

Launch Multi-File Source-Code Programs

Linking Run-Time Images without JMODs

Annotations Processing