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Early Access Program Features

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. Avatar

    Jens Voss says:

    October 1, 2015

    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. Avatar

    Jim Meyer says:

    October 1, 2015

    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.

    • Avatar

      Andrey Cheptsov says:

      October 1, 2015

      Yes, v14.1 and v15 store their settings in separate places. Fell free to run both simultaneously.

      • Avatar

        Jim Meyer says:

        October 1, 2015

        Great. Thanks!

        What about projects. Are they compatible between the two versions, or should I take care not to open them in V15?.

        • Avatar

          Andrey Cheptsov says:

          October 2, 2015

          They’re compatible. The project model didn’t change.

  3. Avatar

    Alexey says:

    October 1, 2015

    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

    • Avatar

      Matthew L Daniel says:

      October 1, 2015

      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.

    • Avatar

      Pointer says:

      October 1, 2015

      200% ? nice! 😀

    • Avatar

      Kevin Jordan says:

      October 2, 2015

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

  4. Avatar

    David Zemon says:

    October 1, 2015

    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. Avatar

    jtonic says:

    October 1, 2015


    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.



    • Avatar

      Andrey Cheptsov says:

      October 2, 2015

      Yes, the preview build has the regular EAP splash, we didn’t change it.

  6. Avatar

    eumust says:

    October 2, 2015

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

    • Avatar

      Andrey Cheptsov says:

      October 2, 2015

      Yes, we’re already working on it:

    • Avatar

      Elijah Saounkine says:

      November 12, 2015

      Just downloaded the stable release, had the same issue on me El Capitan.
      Apparently the workaround is to:
      * Copy the application from .dmg to Desktop
      * Start it (accepting to trust this application downloaded from the web)
      * Close it
      * Move to the Applications directory
      * Will be able to start up normally

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

    October 5, 2015

    […] UPDATE: IntelliJ IDEA 15 Preview is available. Learn more… […]

  8. Avatar

    Chathuranga says:

    October 8, 2015


  9. Avatar

    Jim Meyer says:

    October 12, 2015

    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?

    • Avatar

      Jim Meyer says:

      October 12, 2015

      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.

      • Avatar

        Markus says:

        October 22, 2015

        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. Avatar

    Chris says:

    October 14, 2015

    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:

    • Avatar

      Maksim Sobolevskiy says:

      October 16, 2015

      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. Avatar

    Graham Triggs says:

    October 15, 2015

    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.

  12. IntelliJ IDEA Tips and Tricks | JetBrains IntelliJ IDEA Blog says:

    October 23, 2015

    […] weeks ago we announced IntelliJ IDEA Preview and now we are preparing for the release. Hadi Hariri, Developer Advocacy Lead at JetBrains, […]

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