A long time for stop developing minecraft plugins due to busy about university and side works. Coming back from a long learning journey, i decide to recode my personal minecraft api for upcoming new server. Found that the code now i can build it with more structural design pattern. Such as MinecraftAPI interface class for runtime reloadable content. package me.oska.core.abs; public interface MinecraftAPI { void register(); void unregister(); void intialise(); void teardown(); } Also i have updated my reader utility code for reading jar class with functional interface make it more flexible. package me.oska.core.util; import me.oska.core.OskaCore; import me.oska.core.lambda.VoidAction; import org.apache.commons.io.FilenameUtils; import java.io.File; import java.net.URL; import java.net.URLClassLoader; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class ReaderUtil { public static void readJAR(File fold