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Sep 17, 2026 · Backend Development

Java 27 Released: G1 Default GC, Compact Object Headers, Post-Quantum TLS, JFR Redaction

Java 27 introduces four final features: G1 becomes the universal default garbage collector, compact object headers reduce memory overhead by 4 bytes per object, TLS 1.3 adds post-quantum hybrid key exchange by default, and JFR automatically redacts sensitive data like passwords and tokens before recording.