Top Java Conferences in 2026

The most prominent java conferences on the calendar in 2026, ranked by expected attendance so you can prioritize where to spend your travel budget.

  1. 1

    Spring I/O

    ConferenceApr 13–15, 2026Barcelona, ES~500 attendees
  2. 2

    JCON EUROPE

    ConferenceApr 20–23, 2026Cologne, DE~500 attendees
  3. 3

    betterCode() Spring

    ConferenceApr 27, 2026~500 attendees
  4. 4

    Devoxx UK

    ConferenceMay 6–7, 2026London, GB~500 attendees
  5. 5

    Java Day Istanbul

    ConferenceApr 18, 2026Istanbul, TR~150 attendees
  6. 6

    JAX

    ConferenceMay 4–8, 2026Mainz, DE
  7. 7

    DDX Munich

    ConferenceMay 9, 2026Munich, DE
  8. 8

    XtremeJ Online Conference

    ConferenceMay 12, 2026
  9. 9

    Clean Architecture Masterclass

    OtherMay 28–29, 2026
  10. 10

    JJUG CCC Spring

    ConferenceMay 30, 2026Tokyo, JP
  11. 11

    Clean Code: The Next Level

    OtherSep 24–25, 2026
  12. 12

    XtremeJ

    ConferenceNov 3, 2026

How this list is built

We rank by expected attendance because it's the closest proxy we have for prominence — bigger events draw bigger speakers, more sponsors, and (usually) more substantive deal flow. Where attendance isn't known, the event drops below ranked entries even if it's well-regarded. If you want raw inventory instead of a curated list, the java conferences hub has every event in the database, not just the top 25.

Total in this category: 12 events.