Java 27: What's New?

7 hours ago

G1 becomes the default garbage collector in all environments, having been improved to match or exceed the performance of Serial GC.
Post-quantum hybrid key exchange for TLS 1.3 is introduced to enhance security against future quantum computing threats.
Compact object headers are enabled by default, reducing memory usage and improving performance.
JFR now includes in-process data redaction to mask sensitive information by default, with configurable filters.
No features moved out of preview in this release, while several features remain in preview or incubator modules.
New APIs and methods are added, including inverse hyperbolic functions in Math and StrictMath, and enhanced string and BigDecimal operations.
Performance improvements include optimizations for HashMap.putAll() and binary search via AVX2 intrinsics.
Security updates include TLS certificate compression support and additional certificates in the JVM truststore.
The experimental JVM Compiler Interface (JVMCI) has been removed, affecting projects like GraalVM.

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