Java Utililty Methods ClassLoader Load

List of utility methods to do ClassLoader Load

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Description

The list of methods to do ClassLoader Load are organized into topic(s).

Method

ListgetDirectories(String path)
Locate all directories in given package 
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
assert classLoader != null;
Enumeration<URL> resources = classLoader.getResources(path);
List<URL> dirs = new ArrayList<URL>();
while (resources.hasMoreElements()) {
    dirs.add(resources.nextElement());
return dirs;
...
FilegetFile(final String filename)
Get a File for referencing a file on the classpath. 
final URL url = getURL(filename);
return new File(url.toURI());
FilegetFile(final String name)
get File 
final File testFile = new File(Thread.currentThread().getContextClassLoader()
        .getResource("resources" + File.separator + name).toURI());
return testFile;
FilegetFile(Object obj, String filename)
get File 
String file = obj.getClass().getPackage().getName().replace('.', '/') + '/' + filename;
URL url = obj.getClass().getClassLoader().getResource(file);
return new File(url.getFile());
StringgetFileContents(String filename)
get File Contents 
StringBuffer sb = new StringBuffer();
String p = "xsp/extlib/designer/junit/resources/" + filename; 
ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
int ch;
InputStream in = null;
try {
    URL url = contextClassLoader.getResource(p);
    in = url.openStream();
...
StringgetFileContents(String path)
Uses the toURL() call to convert the path and as a result can find files on the classpath. 
URL url = toURL(path);
if (url == null)
    throw new IOException("File not found: " + path);
return getFileContents(new FileInputStream(url.getPath()));
FilegetFileFromPath(Object obj, String fileName)
get File From Path 
ClassLoader classLoader = obj.getClass().getClassLoader();
URL resource = classLoader.getResource(fileName);
return new File(resource.getPath());
InputStreamgetFileFromPool(String path)
get File From Pool 
return loader.getResourceAsStream(path);
StringgetFileFullPath(String file)
get File Full Path 
String path = ResourcePath(file);
File fileTmp = new File(path);
if (fileTmp.exists()) {
    return path;
return null;
ListgetFilesInPackage(String packageName)
Given a package name, attempts to reflect to find all file names within the package on the local file system. 
List<String> fns = 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 fns;
String directoryString = directoryURL.getFile();
...