[Bug] FindClass supports more than standard states

[hextriclosan]

Java program that reproduces it

package samples.javacore.loadlibrary.example;

public class JniClassOperationsDemo {
    static {
        System.loadLibrary("jni_test_lib");
    }

    private static native Class<?> findClass(String className);

    public static void main(String[] args) {
        test("dot notation", "java.lang.String"); // fixme: should not pass
        test("primitive I", "I"); // fixme: should not pass
        test("primitive J", "J"); // fixme: should not pass
        test("primitive V", "V"); // fixme: should not pass
    }

    private static void test(String label, String className) {
        try {
            Class<?> clazz = findClass(className);
            System.out.printf("[OK] %s -> %s%n", label, clazz);
        } catch (Throwable t) {
            System.out.printf("[FAIL] %s -> %s%n", label, t);
        }
    }
}

Steps to reproduce

Run: cargo run -- package samples.javacore.loadlibrary.example.JniClassOperationsDemo

Expected behaviour

Should throw java.lang.NoClassDefFoundError

Actual behaviour

Creates corresponding Class<?>

Environment

Field	Value
OS	Ubuntu 24.04 x86_64 / macOS 14 arm64 / Windows 11
Rust version	rustc 1.95.0 (59807616e 2026-04-14)
JDK version	25

Additional context