Java Utililty Methods Class from Package

ArrayList classes = new ArrayList();
File directory = null;
try {
    URL str = Thread.currentThread().getContextClassLoader().getResource(pckgname.replace('.', '/'));
    System.out.println("instance advice..." + new File(str.getFile()).getName());
    directory = new File(str.getFile());
} catch (NullPointerException x) {
    throw new ClassNotFoundException(pckgname + " does not appear to be a valid package");
...

Set<File> classes = new HashSet<File>();
ClassLoader cl = Thread.currentThread().getContextClassLoader();
List<URL> urls = Collections.list(cl.getResources(pkg.replaceAll("\\.", "/")));
for (URL url : urls) {
    File dir = new File(url.toURI());
    if (dir.isDirectory()) {
        for (File file : dir.listFiles()) {
            if (file.isFile() && file.getAbsolutePath().endsWith(".class")) {
...

ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
String path = pkg.replace('.', '/');
Enumeration<URL> resources = classLoader.getResources(path);
List<Class<?>> classes = new ArrayList<Class<?>>();
while (resources.hasMoreElements()) {
    URL resource = resources.nextElement();
    if (resource.getProtocol().equalsIgnoreCase(PROTOCOL_JAR)) {
        try {
...

ArrayList<File> directories = new ArrayList<File>();
try {
    ClassLoader cld = Thread.currentThread().getContextClassLoader();
    if (cld == null) {
        throw new ClassNotFoundException("Can't get class loader.");
    String path = packageName.replace('.', '/');
    Enumeration<URL> resources = cld.getResources(path);
...

String pkgname = pkg.getName();
ArrayList<Class<?>> classes = new ArrayList<Class<?>>();
File directory = null;
String fullPath;
String relPath = pkgname.replace('.', '/');
System.out.println("ClassDiscovery: Package: " + pkgname + " becomes Path:" + relPath);
URL resource = ClassLoader.getSystemClassLoader().getResource(relPath);
System.out.println("ClassDiscovery: Resource = " + resource);
...

List<Class<?>> classes = new ArrayList<Class<?>>();
List<File> directories = new ArrayList<File>();
try {
    ClassLoader cld = Thread.currentThread().getContextClassLoader();
    if (cld == null) {
        throw new ClassNotFoundException("Can't get class loader.");
    Enumeration<URL> resources = cld.getResources(packageName.replace('.', '/'));
...

Set<Class<?>> classes = new HashSet<Class<?>>();
JarInputStream jarInputStream = null;
try {
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    Enumeration<URL> resources = classLoader.getResources(packageName.replace('.', '/'));
    while (resources.hasMoreElements()) {
        URL res = resources.nextElement();
        if (res.getProtocol().matches("(jar|zip)")) {
...

return getClassesForPackage(pckgname, true);

final ArrayList<Class<?>> classes = new ArrayList<>();
try {
    final ClassLoader cld = Thread.currentThread().getContextClassLoader();
    if (cld == null) {
        throw new ClassNotFoundException("Can't get class loader.");
    final Enumeration<URL> resources = cld.getResources(pckgname.replace('.', '/'));
    URLConnection connection;
...

List<Class> classes = new ArrayList<>();
String packageNameSlashed = "/" + packageName.replace(".", "/");
URL directoryURL = Thread.currentThread().getContextClassLoader().getResource(packageNameSlashed);
if (directoryURL == null) {
    System.out.println("Could not retrieve URL resource: " + packageNameSlashed);
    return classes;
String directoryString = directoryURL.getFile();
...