Robocode 1.9.5.6

Version 1.9.5.6 (30-May-2025)

Bugfix

Lim Sim Yee found and fixed the following vulnerabilities. Thank you for the PRs ❤️

Vulnerabilities fixes:

• Bug #67: The CacheCleaner contained a Directory Traversal Vulnerability when deleting files (recursively).
• Bug #68: Fix for Insecure Temporary File Creation.
• But #70: Fix Integer Overflow Vulnerability in Buffer Write Method.

Download Robocode 1.9.5.6 from here

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

Robocode 1.9.5.4

Version 1.9.5.4 (30-Sep-2024)

Bugfix

• The built-in Eclipse Compiler for Java (ECJ) could not be found.

Download Robocode 1.9.5.4 from here

Robocode 1.9.5.3

Version 1.9.5.3 (11-Sep-2024)

Bugfix

• [#66]: Fixed an issue where Robocode would not start when executing the robocode.sh script for Linux and macOS due to this error: java.lang.UnsupportedOperationException: The Security Manager is deprecated and will be removed in a future release
  • Thanks goes to @scientificworld for this fix. 😊

Improvements

• Upgraded built-in Eclipse Compiler for Java to version 3.39

Download Robocode 1.9.5.3 from here

New tutorials for Robocode

I have spent some time of my summer vacation to write a tutorial named Getting Started, if you are new to Robocode Tank Royale.

In addition, I wrote a tutorial named Beyond the Basics, which any Robocoder should read to advance his/her skills for making more advanced robots. This tutorial is written for the Tank Royale version, but applies the original version of Robocode as well.

Happy Robocoding! ❤️

Robocode 1.9.5.2

Version 1.9.5.2 (24-Oct-2023)

Bugfix:

• Fixed Throwable: java.lang.LinkageError: loader constraint violation: when resolving method issue in the RobotClassLoader.

Download Robocode 1.9.5.2 from here

Robocode 1.9.5.1

Version 1.9.5.1 (30-Jul-2023)

Bugfix:

• Fixed ClassCastException with URLClassLoader when accessing ClassLoader.getSystemClassLoader() on Java version newer than Java 8 and running with -DNOSECURITY=true.

Improvements

• Updated all .bat, .sh, and .command files so the _JAVA_OPTIONS is now set automatically regardless of the Java version.
• Updated dependencies.

Download Robocode 1.9.5.1 from here