Also (on some runtimes): - Sandbox code modules If a library doesn't need any permissions, and it's not granted any, then attempts to e.g. access the filesyst

Also (on some runtimes): - Sandbox code modules If a library doesn't need any permissions, and it's not granted any, then attempts to e.g. access the filesystem or network will throw exceptions. The JVM can do this, but it's not well documented how to use it.