IntelliJ IDEA 15 Preview is Available!

Every week since the very opening of IntelliJ IDEA 15 EAP we’ve been teasing you with sneak peeks of the new features. Huge thanks to everyone who contributed either by sharing their feedback or sending us bug reports. Now most of the work is done, and we’re happy to announce the IntelliJ IDEA 15 public preview! You’re very welcome to download it and give a try to all its bells and whistles right away.


The notable new features of this preview include:

  • Easier debugging of lambda expressions
  • Inspection that spots code duplicates on the fly
  • Find in Path with instant preview
  • The Expression Type action for Java and Groovy (shows inferred type of any expression)
  • Run configurations enhancements (status indicators and gutter icons)
  • UI adjustments for color deficiency
  • HiDPI support improvements
  • Spring 4.2 and Hibernate 5.0 support
  • Groovy Builder AST transformation
  • Improved ReactJS
  • TypeScript 1.6
  • Updated database tools

And the last, but not least is built-in Kotlin M14 plugin.

Of course, the complete list of changes is much longer, so everyone will find something new to enjoy. More information can be found on the official preview page, from which you can also download the latest build, try it, and share your feedback with us, so that we could make the final release even better!

We also invite you to join a Live Webinar: IntelliJ IDEA 15 Preview on October, 7th. In this webinar you will get an overview of the features already available in the preview.

Develop with Pleasure!

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25 Responses to IntelliJ IDEA 15 Preview is Available!

  1. Jens Voss says:

    I was wondering what has changed between build 142.5047.6 and the public preview. Are there any release notes? The link ( given on the confluence page doesn’t seem to work.

  2. Jim Meyer says:

    Is it possible to run the Preview 15 side by side with 14.1? I’m looking to test React and Grails 3.0 editor support.

  3. Alexey says:

    EAP versions of Idea 15 consume a lot of CPU (100-200%) when typing.
    Help me please to tune this sad behaviour
    ps MBP early 2011, OS X 10.9.5 Maverics

    • There is an existing process through which you can report performance problems to JetBrains. It is absolutely not something one can troubleshoot via a blog comment system.

      Separately, in my experience, I have found that one of two things can be a fast fix to odd IntelliJ behavior: the magic of “Invalidate caches and restart”, followed by the equally magic “File, Export settings…” and (since you’re on OSX): rm -rf $HOME/Library/*/IntelliJIdea15 to get a fresh profile. You can, of course, also zip up those folders before destroying them, if you wish.

      Best of luck in your troubleshooting, and I hope it’s something simple.

    • Pointer says:

      200% ? nice! 😀

    • Kevin Jordan says:

      I have CPU usage issues with the preview mostly with the code inspector, but I didn’t have them with the last EAP.

  4. David Zemon says:

    Have you guys ever thought of making a graph: Y-axis in megabytes, X-axis is time… and you plot the file sizes of each IDE over the years :) I think it would be pretty funny

  5. jtonic says:


    For me, after the update, the splash screen is not like the one presented in this article.
    Also in the about dialog the image is for 15 EAP.



  6. eumust says:

    OSX ElCapitan says that “IntelliJ IDEA 15 is damaged and can’t be opened.”. Is there something wrong with signature?

  7. Pingback: IntelliJ IDEA 15 EAP is Open | JetBrains IntelliJ IDEA Blog

  8. Chathuranga says:


  9. Jim Meyer says:

    On Mac, the UI and Editor font seems very blurry, almost bold. Is there a way to achieve the same crisp font rendering as with IDEA 14?

    • Jim Meyer says:

      Update: Found the “Appearance & Behavior -> Appearance” settings page. On it there’s an Antialiasing option:

      Grayscale: Not sub-pixel, although it renders roughly the same font weight as IDEA 14 :/

      Subpixel: Sub-pixel, but much bolder font rendering than compared to IDEA 14 :/

      Hope to see a way to render the fonts like they were in IDEA 14 on Mac. Currently it seems like both options are a step down in terms of legibility.

      • Markus says:

        Thanks for posting about “Grayscale”.

        Font rendering could become THE annoyance preventing me from using IDEA 15. Anything that makes IntelliJ render the fonts differently than native MacOS applications just feels alien on the Mac. I had to stop using quite a few pieces of software because of this reason (e.g. Firefox).

  10. Chris says:

    Did “Zero-latency typing” make it into this preview? This is one of the biggest features I’m looking forward to.

    For those who don’t know, this is what I’m referring to:

    • Maksim Sobolevskiy says:

      Hello, Chris! We are still working on it, and now you can turn it on only as described—by editing “” file. Most likely it’ll be fully available in minor update to 15 version.

  11. Graham Triggs says:

    I’m liking the public preview! The HiDPI support on Windows was much needed, and now on MacOS I don’t have the discrete GPU kicking in.

    Is there any possibility of you working with other MacOS tool providers to use your patched JVM? Specifically, I’m thinking of the likes of YourKit – it would be great to be able to use a profiler without the discrete GPU being taxed.

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