Robocode 1.9.5.5

Version 1.9.5.5 (29-Mar-2025)

Changes

• Robocode cannot run with Java 24, which implemented JEP 486: Permanently Disable the Security Manager.
  • Robocode has its own security manager built on top of Java's Security Manager, which has now been removed with Java 24.
  • Robocode will not start up when running Robocode on Java 24 and newer. Instead, an error message is written out that Robocode does not support Java 24.
  • Fixing this issue requires a big rewrite of large parts of the security mechanisms in Robocode to prevent robots from doing harm on the system and from cheating against other competitor robots in battles.
  • Use Java 23 or an older version of Java instead, or head over to the new platform for Robocode: Robocode Tank Royale.

Download Robocode 1.9.5.5 from here