Java Utililty Methods ClassLoader Load

Collection names = new HashSet();
names.add("javax.management.MBeanServerConnection");
Enumeration resources;
try {
    resources = ClassLoader.getSystemResources(prohibitedProxyInterfacesResource);
} catch (IOException e) {
    throw new ExceptionInInitializerError(
            new IOException("problem getting resources: " + prohibitedProxyInterfacesResource)
...

Properties props = new Properties();
try {
    if (Platform.isRunning()) {
        Bundle bundle = Platform.getBundle(bundleName);
        URL url = bundle.getResource(fileName);
        String filepath = FileLocator.toFileURL(url).getFile();
        props.load(new FileInputStream(new File(filepath)));
    } else {
...

String property = null;
try {
    property = System.getProperty(propertyName);
} catch (SecurityException security) {
    if (!propertyName.equals("ptolemy.ptII.dir")) {
        throw new RuntimeException("Could not find '" + propertyName + "' System property", security);
if (propertyName.equals("user.dir")) {
    try {
        File userDirFile = new File(property);
        return userDirFile.getCanonicalPath();
    } catch (IOException ex) {
        return property;
if (property != null) {
    return property;
if (propertyName.equals("ptolemy.ptII.dirAsURL")) {
    File ptIIAsFile = new File(getProperty("ptolemy.ptII.dir"));
    try {
        URL ptIIAsURL = ptIIAsFile.toURI().toURL();
        return ptIIAsURL.toString();
    } catch (java.net.MalformedURLException malformed) {
        throw new RuntimeException("While trying to find '" + propertyName + "', could not convert '"
                + ptIIAsFile + "' to a URL", malformed);
if (propertyName.equals("ptolemy.ptII.dir")) {
    String namedObjPath = "ptolemy/kernel/util/NamedObj.class";
    String home = null;
    URL namedObjURL = Thread.currentThread().getContextClassLoader().getResource(namedObjPath);
    if (namedObjURL != null) {
        String namedObjFileName = namedObjURL.getFile().toString();
        if (namedObjFileName.startsWith("file:")) {
            namedObjFileName = namedObjFileName.substring(6);
        String abnormalHome = namedObjFileName.substring(0,
                namedObjFileName.length() - namedObjPath.length());
        home = (new File(abnormalHome)).toString();
        if (home.endsWith("!")) {
            home = home.substring(0, home.length() - 1);
        String ptsupportJarName = File.separator + "DMptolemy" + File.separator + "RMptsupport.jar";
        if (home.endsWith(ptsupportJarName)) {
            home = home.substring(0, home.length() - ptsupportJarName.length());
        ptsupportJarName = File.separator + "ptolemy" + File.separator + "ptsupport.jar";
        if (home.endsWith(ptsupportJarName)) {
            home = home.substring(0, home.length() - ptsupportJarName.length());
    if (home == null) {
        throw new RuntimeException(
                "Could not find " + "'ptolemy.ptII.dir'" + " property.  Also tried loading '" + namedObjPath
                        + "' as a resource and working from that. " + "Vergil should be "
                        + "invoked with -Dptolemy.ptII.dir" + "=\"$PTII\"");
    try {
        System.setProperty("ptolemy.ptII.dir", home);
    } catch (SecurityException security) {
    return home;
if (property == null) {
    return "";
return property;

return new InputStreamReader(getStream(name), encoding);

if (null != ROOT_PATH) {
    return ROOT_PATH;
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
if (null == classLoader) {
    classLoader = ClassLoader.getSystemClassLoader();
URL url = classLoader.getResource("/");
...

return URLDecoder.decode(ClassLoader.getSystemResource("").getFile(), "utf-8");

copyResource(version + "-" + generation + "-big-Digest.crc32");
copyResource(version + "-" + generation + "-big-TOC.txt");
copyResource(version + "-" + generation + "-big-CompressionInfo.db");
copyResource(version + "-" + generation + "-big-Filter.db");
copyResource(version + "-" + generation + "-big-Index.db");
copyResource(version + "-" + generation + "-big-Statistics.db");
copyResource(version + "-" + generation + "-big-Summary.db");
copyResource(version + "-" + generation + "-big-TOC.txt");
...

return new FileInputStream(file);

InputStream ret = null;
try {
    if (source.indexOf(":") > 1) {
        URL url = new URL(source);
        ret = url.openStream();
    } else {
        FileInputStream f = new FileInputStream(source);
        ret = f;
...