Code-First Java 9 Tutorial // nipafx

A comprehensive code-first overview of Java 9 features covering setup, tool support, and migration challenges. Language changes include private interface methods, try-with-effectively-final resources, and diamond operator improvements. New and improved APIs include Stream and Optional enhancements, collection factory methods (List.of, Set.of, Map.of), reactive streams via Flow API, stack-walking, and OS process improvements. JVM changes cover multi-release JARs, redirected platform logging, unified logging, and performance improvements like compact strings. The flagship feature, the Java Platform Module System (JPMS), is introduced with module declarations, reliable configuration, and strong encapsulation.