Knock knock Who's there? long pause Java
High Speed Trading team using Java looking puzzled .... https://lmax-exchange.github.io/disruptor/
the long pause is the JVM starting up
Java 27
121–130 of 427 posts
Re: Java 27
#122Earlier quoted context omitted.
Java & Spring is a good choice whenever you want your application to work and be maintainable 10 years from now, without having to replace the framework and half of the libraries you used. I see few good reasons to ever use something with unstable ecosystem (like Javascript with NodeJS) over Java these days.
Not just the time, but the environment, the OS as well. Where you can run JVM, there's a pretty good chance you can run your app.
If your app requires a specific JDK version and your OS wont support, you can run that JDK version in a modern JVM: https://www.graalvm.org/latest/reference-manual/espresso/
Re: Java 27
#123Earlier quoted context omitted.
When you are already familiar with it or work in a Java shop, there are better options if you are starting from scratch, but if you already have 50 guys that know Java it's a pretty big ask for all of them to switch.
Why not Kotlin?
Most organizations that use Java tend to be pretty conservative with their technology picks and nowadays with newer Java versions the only real gap with Kotlin is null-safety which is supposed to also come to Java at some point.
There is also an organization culture component most of the time, one our engineers actually proposed to use Kotlin for one of the new projects but it got rejected because "We are a Java shop"
Re: Java 27
#124Serious question: when should one use Java for greenfield projects in 2026?
Java-the-language blows, but Kotlin does not, and Java-the-platform is on the Pareto frontier of oldest-yet-most-usable open-source ecosystems. I prefer Rust, and the gaps where it doesn't apply, C# fits my use cases better, but Kotlin/JVM is a rock solid development platform.
Re: Java 27
#125Earlier quoted context omitted.
Not at all a bad choice. It's stable to the point of boring, and there's no shortage of people who know the language and can work with it, it's got best in class tooling, decades worth of libraries almost all very mature. Most of the language's issues are from legacy code bases coded in a style that isn't really relevant to a greenfield project.
It’s still missing null safety, right? Which means it’s still a hard no for me.
The ecosystem has (at long last) standardized on JSpecify (https://jspecify.dev) for nullability annotations. JSpecify allows you to annotate a package or module with `@NullMarked` and your IDE and build (via ErrorProne+NullAway, typically) will check for null safety.
If you develop a library in Java and use it from Kotlin, the built-in Kotlin null-safety will recognize the JSpecify annotations on the library.
Null-restricted types are on the roadmap. See: https://openjdk.org/jeps/8303099
Re: Java 27
#126Earlier quoted context omitted.
Not at all a bad choice. It's stable to the point of boring, and there's no shortage of people who know the language and can work with it, it's got best in class tooling, decades worth of libraries almost all very mature. Most of the language's issues are from legacy code bases coded in a style that isn't really relevant to a greenfield project.
It’s still missing null safety, right? Which means it’s still a hard no for me.
Nullability annotations + tooling makes this a non-issue in practice.
Re: Java 27
#127Earlier quoted context omitted.
I haven't really been in the java space for a while now, but I recall there being a fair bit of criticism[1][2] of checked exceptions over the years. [1] https://www.javacodegeeks.com/2026/01/javas-checked-exceptio... [2] https://reflectoring.io/do-not-use-checked-exceptions/ WRT magic, I've generally thought that was a result of frameworks - Spring, for example. In the past, my feeling was that these impose a sort o…
Checked exceptions are controversial mostly because a lot of the core APIs use them in places where it's pointless to check, like IOException. Using them correctly can be great tho.
>in places where it's pointless to check, like IOException
Can you explain why this is pointless? In my mind, this being a checked exception would hopefully be a hint that I should think about this failure-case and make an explicit decision whether to handle it or not. Network connection failed? Maybe I retry. Maybe I store that data somewhere else as a fall back. Isn't this similar to Go programmers needing to check if err is not nil?
Re: Java 27
#128Earlier quoted context omitted.
Not at all a bad choice. It's stable to the point of boring, and there's no shortage of people who know the language and can work with it, it's got best in class tooling, decades worth of libraries almost all very mature. Most of the language's issues are from legacy code bases coded in a style that isn't really relevant to a greenfield project.
It’s still missing null safety, right? Which means it’s still a hard no for me.
It is really not a big deal nowadays, the problem of the same scale as having index out of bounds error (no language has good defence against this, yet it is not a catastrophe).
Re: Java 27
#129C# dev here: it’s amazing how different this is from a Microsoft release. First off, Oracle are doing versions at approximately twice the cadence. But also, and I’m guessing this is a function of the much larger Java audience: things rarely get two preview versions in a proper release. Updates in beta versions, yes, all the time. It also feels like Microsoft are bundling a lot more into the platform and leaving less…
>> Oracle are doing versions at approximately twice the cadence. This has nothing to do with Oracle. All good that you hear from Java in the last few years, is the great community and good old people from Sun working at Oracle.
Someone doesn't know their Java history. Oracle bought Java 16 years ago in 2010. At that time Sun had been working on Java 7 for over 4 years with no release date in sight. Oracle trimmed the fat and released Java 7 in less than a year. And since then has kept a regular release cadence. Sun would probably still be working on Java 7.
Re: Java 27
#130Earlier quoted context omitted.
Have you tried not returning null or constructing incomplete objects?
Can I trust code I’ve written myself with no guarantees from the language? Maybe. Can I trust code written by dozens of other developers (and/or agents) working on the same project over multiple years? Definitely not.
Null Analysis can be checked and enforced by the CI.