#java-9

2 post(s)

Collection Factories:`List.of` and `Map.copyOf` Without the Mutable Default

Use List.of, Set.of, Map.of, and copyOf for unmodifiable collections that reject nulls — Java 9 factories, not Collections.unmodifiableList wrapping a live ArrayList.

Java

Java Modules:What `module-info.java` Actually Buys You

What JPMS (JEP 261) actually buys: explicit exports, requires, and a smaller runtime — not a file you copy into every repo. import module is a later language convenience.