Getting method parameter names

Question

Hello everyone,
I need to get parameter names of class methods. I checked the API for java.lang.reflect.Method, I found that it gives the types but not the names.
The following should print parameter names but it displays nulls for parameter descriptors. Any idea why ?
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.IntrospectionException;
import java.beans.MethodDescriptor;
public class pd
public static void main( String[] args ) throws IntrospectionException
BeanInfo info = Introspector.getBeanInfo( javax.swing.JLabel.class,javax.swing.JComponent.class );
System.out.println("MethodDescriptors:");
for ( MethodDescriptor md : info.getMethodDescriptors() )
      System.out.println( md.getName() );
      System.out.println("ParameterDescriptors:"+md.getParameterDescriptors());
}

Answer 1

Knowing the "true name" of the parameter gives one power over it?
I suppose one could want to create dynamically generated documentation on arbitrary compiled code, or create some user interface to analyze objects/classes at runtime and call methods directly on them through some generically generated input fields. Perhaps as some sort of learning tool.
In that case, it would be useful to know the parameter names when there's multiple, particularly of the same type. The names ideally would indicate their use... although you can't always assume that.
Not that I can offer much help if the reflection classes don't provide for it already.