gistfile1.java

URL[] urlList = new URL[archives.length];
for (int j = 0; j < urlList.length; j++) {
  urlList[j] = archives[j].toURL();
}
URLClassLoader loader = new URLClassLoader(urlList);

String className = null;
for (int j = 0; j < archives.length; j++) {
  className = findClassInZipFile(folders[i].getName(), archives[j]);
  if (className != null) break;
}

// If no class name found, just move on.
if (className == null) continue;

Class toolClass = Class.forName(className, true, loader);
final Tool tool = (Tool) toolClass.newInstance();

tool.init(Editor.this);