JDK 27 Is Out: 4 Changes That Actually Matter | The Storm Report
Java 27 shipped on 15 September 2026 with 9 JEPs. Here are the ones that change your day. → Compact object headers: every object's header drops from 12 to 8 bytes, on by default (JEP 534) → G1 is the default garbage collector everywhere, even in tiny containers (JEP 523) → Post-quantum TLS 1.3: hybrid X25519MLKEM768 key exchange, on by default (JEP 527) → Still in preview: structured concurrency (7th preview), lazy constants, primitive patterns, Vector API → Should you upgrade? 27 isn't LTS, so production stays on 25. JDK 28 is set to preview value classes. 📰 The Storm Report: Java and Spring Boot news in 60 seconds. Sources: openjdk.org/projects/jdk/27 · JEP 519 for the heap benchmark Instagram: @thecodestorm #java #jdk27 #shorts
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JDK 27 is out: what actually matters
Smaller objects by default, G1 everywhere, quantum-ready TLS, and why JDK 25 is still the one for production.