Oracle released Java 27 as a 6-month support cycle (non-LTS) version featuring 9 improvements. The main change is making G1 (Garbage-First) the default garbage collector universally, replacing previous server-only deployments. Additionally, Compact Object Headers reduces memory overhead from 96-bit to 64-bit, and JavaFX support is being restored with JavaFX 27 under the Oracle Java Verified Portfolio program, extending JDK 8 support through March 2028.