New Java 22 - 25 new features

Several criticisms have been raised regarding the Java language as modern languages emerge or other languages evolve. These are the following:

• Difficult to learn
• Threads are resource-intensive
• Garbage collector pauses the application for too long (latency). Moreover, this can increase with load.
• Slow startup
• Integration with native code is difficult (JNI)
• Cryptography: quantum computer-resistant algorithms
• Stream API is not extensible
• If the bytecode changes, bytecode handling libraries need to be updated
• JavaDoc documentation must be written in HTML

Solutions have been provided for all of these by Java version 25. The training presents these through practical examples.

• Foreign Function & Memory API
• Unnamed Variables & Patterns
• Launch Multi-File Source-Code Programs
• Markdown Documentation Comments
• Ahead-of-Time Class Loading & Linking, Command-Line Ergonomics, Ahead-of-Time Method Profiling
• Class-File API
• Stream Gatherers
• Synchronize Virtual Threads without Pinning
• Quantum-Resistant algorithms
• Scoped Values
• Key Derivation Function API
• Module Import Declarations
• Flexible Constructor Bodies
• Compact Object Headers
• Garbage collection
• Deprecations and removals
• Preview, Incubator
• String Templates
• Vector API
• Structured Concurrency
• Primitive Types in Patterns, instanceof, and switch
• PEM Encodings of Cryptographic Objects
• Stable Values

• secure handling of development tools
• packages
• arrays
• classes
• interfaces
• abstract classes
• exception handling
• basics of concurrent programming
• Collections Framework API (List, Set, Queue, Map interfaces and their implementations)

Since part of the training materials is in English, a basic level of English is required, sufficient for reading documentation.