Java Utililty Methods ClassPath Get

List of utility methods to do ClassPath Get

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Description

The list of methods to do ClassPath Get are organized into topic(s).

Method

FilegetClassPathFile(Class clazz)
Gets the class path file. 
File file = getClassFile(clazz);
for (int i = 0, count = clazz.getName().split("[.]").length; i < count; i++)
    file = file.getParentFile();
if (file.getName().toUpperCase().endsWith(".JAR!")) {
    file = file.getParentFile();
return file;
FilegetClasspathFile(final String name)
get Classpath File 
URL url = ClassLoader.getSystemResource(name);
if (!url.getProtocol().equals("file")) {
    throw new FileNotFoundException("Could not find file named by resource: " + name);
File file = new File(url.getPath());
return file;
FilegetClassPathFile(final String path, final ClassLoader classLoader)
Gets a File from a String that represents file path which is relative to current Class Path 
final URL url = classLoader.getResource(path);
if (url == null) {
    return null;
return new File(url.getFile());
FilegetClasspathFile(String fn)
get Classpath File 
File f = null;
try {
    f = new File(Thread.currentThread().getContextClassLoader().getResource(fn).toURI());
} catch (URISyntaxException e) {
    e.printStackTrace();
return f;
FilegetClassPathFile(String pathName)
get Class Path File 
if (pathName.indexOf("%20") != -1)
    pathName = pathName.replaceAll("%20", " ");
File tmp = new File(getResourceURL(pathName).getFile());
return tmp;
StringgetClasspathFilePathFromName(String fileName)
Gets the absolute path to the specified file on the classpath. 
URL fileURL = Thread.currentThread().getContextClassLoader().getResource(fileName);
if (fileURL == null) {
    throw new FileNotFoundException("Failed to find file on classpath: " + fileName);
URI fileURI = fileURL.toURI();
File file = new File(fileURI);
return file.getAbsolutePath();
URLgetClassPathFor(final Class clazz)
Returns the path for the jar or directory that contains a given java class. 
if (clazz == null) {
    throw new IllegalArgumentException("Null class");
try {
    final URL url = getClassFile(clazz);
    String urlString = url.toString();
    final int endIndex = urlString.toLowerCase().indexOf("!");
    if (endIndex > 0) {
...
FilegetClasspathForClass(Class targetClass)
get Classpath For Class 
URI location = null;
try {
    location = targetClass.getProtectionDomain().getCodeSource().getLocation().toURI();
} catch (URISyntaxException e) {
    throw new RuntimeException(e);
if (!location.getScheme().equals("file")) {
    throw new RuntimeException(String.format("Cannot determine classpath for %s from codebase '%s'.",
...
HashSetgetClassPathFromString(String classpath)
get Class Path From String 
HashSet<URL> cpurls = new HashSet<URL>();
StringTokenizer st = new StringTokenizer(classpath, File.pathSeparator);
while (st.hasMoreTokens()) {
    try {
        cpurls.add(new File(st.nextToken()).toURI().toURL());
    } catch (MalformedURLException e) {
        e.printStackTrace();
        System.exit(-1);
...
StringgetClassPathPath()
get Class Path Path 
String path = webRoot + "WEB-INF" + File.separator + "classes";
path = urlDecoder(path);
return path;