code: @SuppressWarnings("unchecked")
      public static boolean findClass(String className) {
          try {
              return getClassLoader().loadClass(className) != null;
          } catch (ClassNotFoundException e) {
              return false;
          } catch (NoClassDefFoundError e) {
              return false;
          }
      }
docs: Find if Class denoted by the given string representation is loadable
  
  @param className class string representation
  @return Class