In the following javadoc extract, the description of the argument factory is out of context.
It is a bad copy/paste from the other constructor where yes a factory argument is used.

[...]
PrivateMLet

public PrivateMLet(URL[] urls,
                   ClassLoader parent,
                   boolean delegateToCLR)

    Constructs a new PrivateMLet for the given URLs. The URLs will be searched in the order specified for classes and resources after first searching in the specified parent class loader. The parent argument will be used as the parent class loader for delegation. The factory argument will be used as the stream handler factory to obtain protocol handlers when creating new URLs.

    Parameters:
        urls - The URLs from which to load classes and resources.
        parent - The parent class loader for delegation.
        delegateToCLR - True if, when a class is not found in either the parent ClassLoader or the URLs, the MLet should delegate to its containing MBeanServer's ClassLoaderRepository.
[...]
###@###.### 2005-07-07 07:25:52 GMT