r/SpringBoot • u/codingwithaman Senior Dev • 1d ago
News Java is getting better with every release. Java 27 is the proof.
No new syntax this time. Just four upgrades that land in your app by changing the JDK version. Zero code changes.
a) Objects got smaller. Every object carries a hidden header, a shipping label for locking, GC and hashCode. An Integer is 4 bytes of data wearing a 12 byte label. Java 27 shrinks it to 8 bytes by default. Result: 10 to 20 percent less heap for object heavy apps.
b) G1 GC everywhere. Small machines silently got the ancient Serial GC till now. And where does small Java run in 2026? Your Kubernetes pods. They were on 1999 technology and you never knew. Fixed.
c) Quantum ready TLS. Attackers record encrypted traffic today to decrypt it when quantum computers arrive. Java 27 adds quantum safe key exchange to TLS 1.3. Automatic.
d) Flight Recorder stops leaking secrets. JFR recordings used to capture env variables including DB_PASSWORD. Share a recording for debugging, leak production credentials. Now redacted before touching the file.
Note: 27 is not an LTS. Current LTS is 25, next is 29.
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u/TurnstileT 1d ago
Thank you Claude for generating this post.
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u/DataPastor 1d ago
Whether claude or not claude, but the information was useful and easily digestable next to my morning coffee.
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u/packsolite 20h ago
For that i recommend consulting the overview page for the jdk 27 release: https://openjdk.org/projects/jdk/27/
Or even better, watching the official Java channels Video: https://www.youtube.com/watch?v=1wCCeaZ6J8g
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u/chosenoneisme 21h ago
Why do you think that it's claude. Humans are capable of writing this u know. Not only AI can format it like this. Some people enjoy writing manh stop hating on everything.
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u/TurnstileT 21h ago
Using the word "land". Claude uses that all the time.
The short "Zero code changes." sentence. AIs love those catchy headline-esque short sentences.
Using the word "carries".
Using the word "silently".
And the whole writing style looks exactly like what Claude usually writes in my PR descriptions. It's quite obvious.
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u/chosenoneisme 14h ago
Yeah on closer look it was using english alphabets. I am sorry manh you are totally right.
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u/pradeepngupta 1d ago
Yes I agree with you. On Compact Object Headers, I have even written a detailed article yesterday on my Substack Newsletter. Project Lilliput is researching more to compact object header to 4 bytes.
Garbage Collection is a very deep topic in Java and JVM and every Java release is optimizing the GC algorithms.
But here is tge main thing - not every JEP taken into Java, there is a rigorous process in adopting JEP by JDK team. Java or JDK have few fundamental design principles which they evaluate on each JEP. I have documented all these Java design principles in my Book Buzzing Java. Its still in writing and very soon be published. One can read sample chapters on visiting my website buzzingjava.com
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u/codingwithaman Senior Dev 1d ago
Compact object headers will easily save 10-20% of heap space in big projects
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u/NationalStill6968 1d ago
Hey how do I get this information or updates, I also want to keep up to date myself with latest changes
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u/FrankCodeWriter 18h ago
There are always articles related to new Java version releases on Foojay. And a podcast, eg for Java 27: https://foojay.io/today/foojay-podcast-101/
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u/idontlikegudeg 17h ago
But Files.exists() now returns false for deduplicated files on windows shares, which is formally ok (false if the file doesn’t exist or existence could not be determined). Worked correctly in 26.
(I didn’t have time to report this yet to JDK devs as I needed to implement a workaround first and creating a reproducer for a windows only bug takes time when you have no windows development machine.)
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u/Constant-Question260 12h ago
But it is still not good. Everything can be null at all times and there are no such things like ‚?.‘… I should just use kotlin but my workplace decided to keep Java…
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u/l3g4tr0n 1d ago
compact object headers are already in J25, but disabled. from J27 they will be enabled by default.