Robocode 1.9.4.8

Version 1.9.4.8 (29-Nov-2022) Reworked Disabling Security Manager

Bugfixes

• Rendering issues on Windows using accelerated hardware, by setting this Java properties:
  • sun.java2d.d3d=false (turn off use of Direct3D)
  • sun.java2d.ddoffscreen=false (turn of Direct Draw off-screen)
  • sun.java2d.noddraw=true (no use of Direct Draw)
  • sun.java2d.opengl=True
• Adding -source 1.5 to the ECJ compiler options to prevent "...only available if source level is 1.5 or greater" error when compiling with ECJ.

Improvements

• Security Manager: When setting the NOSECURITY=true (e.g. via the -DNOSECURITY=true property in the java command-line), then internal security manager of Robocode is now totally disabled, and falling back on the default security manager used in Java.
  • This fixes issues with the class loader not being able to find classes resulting in ClassNotFoundExceptions, and other issues as well.
• Updated built-in Eclipse Compiler for Java (ECJ) to version 3.26 (June 2021), which is the last version of ECJ capable to run on Java 8 (newer ECJ versions requires Java 11 as minimum).

Download Robocode 1.9.4.8 from here

Robocode 1.9.4.7

Version 1.9.4.7 (05-Aug-2022) System.getenv support

Changes

• #35 System.getenv is now allowed and can now be called without throwing a security exception. Hence, the robot will not be banned from battles when using System.getenv.

Download Robocode 1.9.4.7 from here

Robocode 1.9.4.6

Version 1.9.4.6 (15-Jun-2022) The Java 18 support release

Newer versions of Java is making things harder for the codebase of Robocode.

With Java 18 (JEP 411), the Security Manager is disabled by default, but can be allowed by the user from the command line. Hence, with this version of Robocode, the -Djava.security.manager=allow system property has been added to the script for making it possible to run Robocode on Java 18. Note that this is just a work-around, as the Security Manager will be permanently removed from Java at some point in the future when newer major versions of Java are released.

This is a big concern for Robocode, which uses the Security Manager to control access to various resources between robots running on the same JVM. And currently, no good substitute exists for replacing the Security Manager (or find a good way to remove it) from Robocode without breaking things.

Bugfix

• Java 18 fix: Robocode could not run on the newest Java 18 due to the terminally deprecated Security Manager.
  • The Security Manager is now explicitly being allowed to run with the .bat, .sh, and .command files by adding setting this system property: -Djava.security.manager=allow.
• Give bots without rank highest priority in the LiteRumble (RoboRumble). Thank you Xor for this fix! :)

Download Robocode 1.9.4.6 from here

Robocode 1.9.4.5

Version 1.9.4.5 (22-03-2022)

Bugfix

• Fixed java.io.IOException: Stream Closed when auto-recording is enabled.
• A mystic word on was written to the console.

Download Robocode 1.9.4.5 from here