Mimk-054-en-javhd-today-0901202101-58-02 | Min

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# 3️⃣ Run the virtual‑thread server java -jar build/libs/loom-echo-server.jar MIMK-054-EN-JAVHD-TODAY-0901202101-58-02 Min

| # | Feature | Why It Matters | One‑Liner Example | |---|---------|----------------|-------------------| | 1️⃣ | | Replace boiler‑plate anonymous classes; enable functional pipelines. | list.sort((a,b) -> a.compareTo(b)); | | 2️⃣ | Streams API | Declarative data processing (filter, map, reduce). | int sum = nums.stream().filter(n->n%2==0).mapToInt(Integer::intValue).sum(); | | 3️⃣ | Optional | Safer handling of potentially‑null values; reduces NullPointerException . | String name = optName.orElse("Anonymous"); | | 4️⃣ | The Module System (JPMS) | Strong encapsulation, better build times, and reliable deployment. | module com.myapp requires java.sql; exports com.myapp.api; | | 5️⃣ | Local‑Variable Type Inference ( var ) | Cleaner code without sacrificing type safety (Java 10+). | var map = new HashMap<String, List<Integer>>(); | | 6️⃣ | Records (Preview in Java 14, stable in 16) | Concise, immutable data carriers. | record Point(int x, int y) {} | | 7️⃣ | Switch Expressions & Pattern Matching (Preview) | More expressive branching, fewer bugs. | int result = switch (day) case MON, TUE, WED -> 1; case THU, FRI -> 2; default -> 0; ; | | String name = optName