### Question:
ResourceClassLoader extends ClassLoader { @Override public synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { Class c = findLoadedClass(name); if (c == null) { try { c = findClass(name); } catch (ClassNotFoundException e) { c = super.loadClass(name, resolve); } } if (resolve) { resolveClass(c); } return c; } ResourceClassLoader(String prefix, ClassLoader parent); @Override synchronized Class<?> loadClass(String name, boolean resolve); @Override URL getResource(String name);  }### Answer:
@Test(expected = ClassNotFoundException.class) public void contentOfTheJarNotVisibleWithNormalClassLoaderTest() throws ClassNotFoundException { Class<?> simpleClass = testCaseClassLoader.loadClass("pof.Simple"); }
@Test public void workingWithClassFromPrivateClassPathTest() throws ClassNotFoundException, NoSuchMethodException, SecurityException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, IOException { ResourceClassLoader resourceClassLoader = new ResourceClassLoader("private-classpath", testCaseClassLoader); Class<?> simpleClass = resourceClassLoader.loadClass("pof.Simple"); Constructor<?> simpleClassConstructor = simpleClass.getConstructor(new Class[] {}); Object simpleObject = simpleClassConstructor.newInstance(new Object[] {}); Method sayHelloMethod = simpleClass.getMethod("sayHello", new Class[] {}); Object sayHello = sayHelloMethod.invoke(simpleObject, new Object[] {}); Assert.assertEquals("hello!", sayHello); Method printVersionMethod = simpleClass.getMethod("printVersion", new Class[] {}); Object printVersion = printVersionMethod.invoke(simpleObject, new Object[] {}); Assert.assertEquals("2.6.0-SNAPSHOT", printVersion); Method getMessageInTextFileMethod = simpleClass.getMethod("getMessageInTextFile", new Class[] {}); Object message = getMessageInTextFileMethod.invoke(simpleObject, new Object[] {}); Assert.assertEquals("Congratulations ! You could read a file from a hidden resource location !", message); }