Loading Jar classes dynamically - 10 Duke points

Question

How can I load a jar class dynamically if it relies on say other interface? Example is, if I have three classes read from the jar file, Test.class, Test1.class and Testable.class
and "class Test implements Testable..."
If I load the Test.class, how do I tell my own class loader that Testable class is along the way, instead of getting a java.lang.NoClassDefFoundError: Testable
Need example source that works for this type of problem.
Cheers
Abraham Khalil

Answer 1

protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException {     
name = name.replace('/', '.').replace('\\', '.');
try { 
// check if system class
return findSystemClass(name);
catch (ClassNotFoundException e) {}
catch (NoClassDefFoundError e) {}
// check if class already loaded
Class cl = null;
JarClassEntry jarEntry = (JarClassEntry) classes.get(name);
if (jarEntry != null) { // new class not loaded
// load class bytes--details depend on class loader
byte[] classBytes = loadClassBytes(name);
if (classBytes == null) {
throw new ClassNotFoundException(name);
String className = name;
if (className.endsWith(".class")) {
className = className.substring(0, className.indexOf(".class"));