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JDK 27: Four Zero-Code Wins, Headlined by Post-Quantum TLS
JDK 27 ships September 15, 2026. Four final JEPs change every Java process with zero code changes — headlined by post-quantum TLS. Here’s what matters.
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JDK 27 looks like a quiet release. Nine JEPs, no LTS badge, and no single feature that reorders the universe the way HTTP/3 did in 26. If you skimmed the list and moved on, I wouldn’t blame you.
I think that read is wrong. JDK 27 is the release where Java stops asking you to opt in to good defaults and simply turns them on. Four of the nine JEPs ship final, and all four change the behavior of every Java process that upgrades — with zero lines of code changed. One of them quietly makes Java one of the first mainstream runtimes to defend against quantum computers by default. General availability is September 15, 2026. Here’s what’s actually in it, ordered by how much it matters.
First, what JDK 27 is (and isn’t)
JDK 27 is a short-term, non-LTS feature release — six months of Oracle support, the second non-LTS since the JDK 25 LTS landed in September 2025 (JDK 26 was the first). The next LTS won’t arrive until JDK 29 in 2027. It’s currently in the Release…
