SecurityManager has been disabled by default since Java 18, and next LTS version (Java 21) will be released in a few days (19th December). This will deprecate the premise of the kata.

Some cheese solutions that needs to be patched:

• https://www.codewars.com/kata/reviews/5bda2d9bc0c2374e1800216b/groups/60417a95a4ac220001a82ff1
• https://www.codewars.com/kata/reviews/5bda2d9bc0c2374e1800216b/groups/639b31063dce3d0001f43084

Duplicate.

The actual/expected values should be compared for approximate equality.

Annoying warnings need to be suppressed.

/workspace/java/src/Bomb.java:3: warning: Reflection is internal proprietary API and may be removed in a future release
import sun.reflect.Reflection;
                  ^
/workspace/java/src/Bomb.java:3: warning: Reflection is internal proprietary API and may be removed in a future release
import sun.reflect.Reflection;
                  ^
/workspace/java/src/Bomb.java:3: warning: Reflection is internal proprietary API and may be removed in a future release
import sun.reflect.Reflection;
                  ^
/workspace/java/src/Bomb.java:3: warning: Reflection is internal proprietary API and may be removed in a future release
import sun.reflect.Reflection;
                  ^
/workspace/java/src/Bomb.java:7: warning: Reflection is internal proprietary API and may be removed in a future release
    Reflection.registerMethodsToFilter(Bomb.class, "<init>");
    ^
Note: /workspace/java/src/Prisoner.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
5 warnings

PrisonChecker.test();

Really? This is what you think is enough for us?
It's totally not a FAIR game.
A fair game is, like Hack 22, exposing the exact implementation in the Preload section to the desc
Or how the hell would we know what the heck is PrisonChecker, PrisonGuard and Bomb

Duplicate of Escaping The Matrix

Duplicate:

https://www.codewars.com/kata/find-the-square-root

Did you accidentally publish before finishing? Because this is not a challenge by any measure.

This is not a kata.

Needs (much!) better testing, including random tests.

Be sure to specify if all inputs will be valid triangles, and make sure you only generate correct random inputs according to the specs.