Can you find all classes in a package using reflection?

Yes, it is possible to find all classes in a package using reflection in Java. You can use the ClassLoader.getSystemClassLoader() method to get the system class loader and then use the loadClass method to load all the classes in a package. Here is an example of how you can do this:

String packageName = "com.example.mypackage";
ClassLoader classLoader = ClassLoader.getSystemClassLoader();
URL packageURL;

packageURL = classLoader.getResource(packageName);

if (packageURL != null) {
    String packagePath = packageURL.getPath();
    if (packagePath != null) {
        File packageDir = new File(packagePath);
        if (packageDir.isDirectory()) {
            File[] files = packageDir.listFiles();
            for (File file : files) {
                String className = file.getName();
                if (className.endsWith(".class")) {
                    className = packageName + "." + className.substring(0, className.length() - 6);
                    Class clazz = classLoader.loadClass(className);
                    // do something with the class

This code will find all the classes in the package com.example.mypackage and load them using the system class loader. You can then do something with the classes, such as calling a method or instantiating an object.