Java Utililty Methods Class Path

List of utility methods to do Class Path

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Class Path

Description

The list of methods to do Class Path are organized into topic(s).

Method

String getAbsolutePath(Class theClass, String path)
Finds the absolute path to a file from the classpath

URL url = theClass.getClassLoader().getResource(path);
if (url == null) {
 throw new NullPointerException("the file " + path + " does not exist in the classpath");
return URLDecoder.decode(url.getFile());

String getAbsolutePath(final Class clazz, final String relative)
get Absolute Path

URL url = clazz.getResource(relative);
String absolutePath = url.getFile().replaceAll("^/+", "");
return absolutePath;

String getApplicationPath(Class cls)
get Application Path

if (cls == null)
 throw new java.lang.IllegalArgumentException("parameter is not null !");
ClassLoader loader = cls.getClassLoader();
String clsName = cls.getName() + ".class";
Package pack = cls.getPackage();
System.out.println("package name is : " + (pack == null));
String path = "";
if (pack != null) {
...

File getAppPath(Class clazz)
get App Path

File appPath = new File(clazz.getProtectionDomain().getCodeSource().getLocation().toURI().getPath());
return appPath.isFile() ? appPath.getParentFile() : appPath;

Class getClass(String parentPath, String className)
get Class

File file = new File(parentPath);
URI uri = file.toURI();
URL url = uri.toURL();
URL[] urls = new URL[] { url };
ClassLoader loader = new URLClassLoader(urls, Thread.currentThread().getContextClassLoader());
Class cls = loader.loadClass(className);
return cls;

String getClassAbsolutePath(Class c)
get Class Absolute Path

String filePath = c.getProtectionDomain().getCodeSource().getLocation().getFile();
try {
 return URLDecoder.decode(filePath, "UTF-8");
} catch (UnsupportedEncodingException e) {
 return null;

File getClassBasePath(Class aClass)
get Class Base Path

String className = aClass.getName();
className = className.replace('.', '/') + ".class";
URL url = aClass.getClassLoader().getResource(className);
if ("file".equals(url.getProtocol())) {
 String dir = url.getFile();
 dir = dir.substring(0, dir.length() - className.length());
 try {
 dir = URLDecoder.decode(dir, "UTF-8");
...

String getClassFilePath(Class clazz)
get Class File Path

try {
 return java.net.URLDecoder.decode(getClassFile(clazz).getAbsolutePath(), "UTF-8");
} catch (Exception e) {
 e.printStackTrace();
 return "";

String getClassFilePath(Class clazz)
get Class File Path

java.net.URL url = clazz.getProtectionDomain().getCodeSource().getLocation();
String filePath = null;
try {
 filePath = java.net.URLDecoder.decode(url.getPath(), "utf-8");
} catch (UnsupportedEncodingException ignore) {
File file = new File(filePath);
return file.getAbsolutePath();
...

String getClassFilePath(Class clazz)
Gets the path to a class file

String className = clazz.getName();
String resourceName = "/" + className.replace('.', '/') + ".class";
URL classURL = clazz.getResource(resourceName);
if (classURL != null) {
 try {
 if (classURL.toString().contains("bundle")) {
 classURL = FileLocator.resolve(classURL);
 File classFile = new File(classURL.getFile());
 String classPathBase = classFile.getAbsolutePath();
 return classPathBase;
 } catch (Exception e) {
 e.printStackTrace();
return className;