Java Utililty Methods Class Loader

final Properties props = new Properties();
final InputStream in = clazz.getClassLoader().getResourceAsStream(filename);
if (in != null) {
    try {
        props.load(in);
    } catch (IOException e) {
        e.printStackTrace();
        props.put("stamp", "loading from " + filename + "failed: " + e);
...

try {
    URL jarFileLocation = manifestFileClass.getClassLoader()
            .getResource(manifestFileClass.getName().replace(".", "/") + ".class");
    if (jarFileLocation != null) {
        String jarFilePath = jarFileLocation.getFile();
        jarFilePath = jarFilePath.substring(0, jarFilePath.indexOf("!"));
        if (jarFilePath.startsWith("file:")) {
            jarFilePath = jarFilePath.substring(jarFilePath.indexOf(":") + 1);
...

URI uri = theClass.getProtectionDomain().getCodeSource().getLocation().toURI();
File file = new File(uri.getPath());
URL url = file.isDirectory() ? uri.resolve(MANIFEST_FILE).toURL()
        : new URL("jar:" + uri.toASCIIString() + "!/" + MANIFEST_FILE); 
try (InputStream in = setupConnection(url).getInputStream()) {
    return new Manifest(in);

URLClassLoader cl = (URLClassLoader) c.getClassLoader();
URL url = cl.findResource("META-INF/MANIFEST.MF");
Manifest manifest = new Manifest(url.openStream());
return manifest;

Enumeration<URL> urlProperties = null;
try {
    urlProperties = cl == null ? ClassLoader.getSystemResources(fileName) : cl.getResources(fileName);
} catch (IOException e) {
    return;
Properties fileProperties = new Properties();
while (urlProperties.hasMoreElements()) {
...

String name = type.getSimpleName();
URL url = type.getResource(name);
if (url == null)
    url = type.getResource(name + ".css");
return url.toExternalForm();

URL url = getURL(relToThisClass, relFileName);
String eol = "\n"; 
String text;
if (url != null) {
    StringBuffer buffer = new StringBuffer();
    InputStream input = url.openStream();
    BufferedReader reader = new BufferedReader(new InputStreamReader(input));
    String line;
...

final TreeSet sysPths = new TreeSet();
gatherSystemPaths(sysPths);
final StringBuilder sbuf = new StringBuilder();
final LinkedList urlLst = new LinkedList();
for (ClassLoader cl = clazz.getClassLoader(); cl != null; cl = cl.getParent()) {
    if (!(cl instanceof java.net.URLClassLoader)) {
        continue;
    final java.net.URLClassLoader ucl = (java.net.URLClassLoader) cl;
    final java.net.URL[] urls = ucl.getURLs();
    if (urls == null)
        continue;
    for (int i = urls.length - 1; i > -1; i--) {
        final java.net.URL url = urls[i];
        final String prot = url.getProtocol();
        if (!"file".equalsIgnoreCase(prot))
            continue;
        urlLst.addFirst(url);
for (final Iterator itr = urlLst.iterator(); itr.hasNext();) {
    final java.net.URL url = (java.net.URL) itr.next();
    final String fnam = url.getFile();
    final File fil = new File(fnam);
    if (sysPths.contains(fil))
        continue;
    if (!fil.exists()) {
        final String unEncNam = URLDecoder.decode(fnam, "utf-8");
        final File unEncFil = new File(unEncNam);
        if (unEncFil.exists())
            sbuf.append(unEncNam);
    } else {
        sbuf.append(fnam);
    sbuf.append(File.pathSeparatorChar);
final String ret = sbuf.toString();
return ret;

System.out.println("Dump classload: " + loader.toString());
URL[] urls = getClassLoaderURLs(loader);
for (int i = 0; urls != null && i < urls.length; i++) {
    System.out.println(urls[i].toString());
System.out.println("End of classload: " + loader.toString());

FileReader reader = null;
try {
    URL url = cl.getResource(path);
    if (url == null)
        throw new NullPointerException("Url not found");
    File file = new File(url.getFile());
    reader = new FileReader(file);
    char[] buffer = new char[1024];
...