Java Utililty Methods Class from Package

List of utility methods to do Class from Package

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Description

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

Method

List>getClasses(String packageName)
Locates all classes in given package 
String path = packageName.replace('.', '/');
List<URL> dirs = getDirectories(path);
ArrayList<Class<?>> classes = new ArrayList<Class<?>>();
ClassLoader loader = URLClassLoader.newInstance(dirs.toArray(new URL[0]),
        Thread.currentThread().getContextClassLoader());
for (URL directory : dirs) {
    String resource = directory.getPath().replace("/" + path + "/", "");
    if (resource.endsWith(".jar")) {
...
Class[]getClasses(String packageName)
Returns an array of classes in a specified package 
try {
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    assert classLoader != null;
    String path = packageName.replace('.', '/');
    Enumeration<URL> resources = classLoader.getResources(path);
    List<File> dirs = new ArrayList<File>();
    while (resources.hasMoreElements()) {
        URL resource = resources.nextElement();
...
IterablegetClasses(String packageName)
get Classes 
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
String path = packageName.replace('.', '/');
Enumeration<URL> resources = classLoader.getResources(path);
List<File> dirs = new ArrayList<File>();
while (resources.hasMoreElements()) {
    URL resource = resources.nextElement();
    dirs.add(new File(resource.getFile()));
List<Class> classes = new ArrayList<Class>();
for (File directory : dirs) {
    classes.addAll(findClasses(directory, packageName));
return classes;
Class[]getClasses(String packageName)
get Classes 
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
assert classLoader != null;
String path = packageName.replace('.', '/');
Enumeration<URL> resources = classLoader.getResources(path);
List<File> dirs = new ArrayList<File>();
while (resources.hasMoreElements()) {
    URL resource = resources.nextElement();
    dirs.add(new File(java.net.URLDecoder.decode(resource.getFile().toString())));
...
ListgetClasses(String packageName)
get Classes 
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
String path = packageName.replace(".", "/");
Enumeration<URL> resources = null;
try {
    resources = classLoader.getResources(path);
} catch (IOException e) {
    e.printStackTrace();
List<File> dirs = new ArrayList<>();
if (resources != null) {
    while (resources.hasMoreElements()) {
        URL resource = resources.nextElement();
        dirs.add(new File(resource.getFile()));
ArrayList<Class> classes = new ArrayList<>();
for (File directory : dirs) {
    classes.addAll(findClass(directory, packageName));
return classes;
Class[]getClasses(String packageName)
Returns all classes from specified package. 
ArrayList<Class> classes = new ArrayList<Class>();
File directory = null;
try {
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    if (classLoader == null) {
        throw new ClassNotFoundException("Can't get class loader.");
    String path = packageName.replace('.', '/');
...
ListgetClasses(String packageName)
Scans all classes accessible from the context class loader which belong to the given package and subpackages. 
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
assert classLoader != null;
String path = packageName.replace('.', '/');
Enumeration<URL> resources = classLoader.getResources(path);
List<File> dirs = new ArrayList<File>();
while (resources.hasMoreElements()) {
    URL resource = resources.nextElement();
    String fileName = resource.getFile();
...
Class[]getClasses(String packageName)
Scans all classes accessible from the context class loader which belong to the given package and subpackages. 
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
assert classLoader != null;
String path = packageName.replace('.', '/');
Enumeration<URL> resources = classLoader.getResources(path);
List<File> dirs = new ArrayList<File>();
while (resources.hasMoreElements()) {
    URL resource = resources.nextElement();
    dirs.add(new File(resource.getFile()));
...
ArrayList>getClasses(String packageName, Class inheritedType)
Scans all classes accessible from the context class loader which belong to the given package and subpackages. 
ArrayList<Class<? extends T>> result = new ArrayList<Class<? extends T>>();
ArrayList<Class<?>> classes = new ArrayList<Class<?>>();
try {
    classes = getClasses(packageName);
} catch (ClassNotFoundException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
...
ListgetClasses(String pckgname)
get Classes 
List<Class> classes = new ArrayList<Class>();
ClassLoader cld = Thread.currentThread().getContextClassLoader();
String path = '/' + pckgname.replace('.', '/');
URL resource = cld.getResource(path);
File directory = new File(resource.getFile());
if (directory.exists()) {
    String[] files = directory.list();
    for (int i = 0; i < files.length; i++) {
...