How to instantiate classes at run time with constructors having arguments?

Question

I have to instantiate some classes in the run-time because they are plugins. The name of the plugin (pluginClassName) comes from a configuration file.
Currently I am doing this to achieve it:-
UIPlugin plugin = (UIPlugin)Class.forName(pluginClassName).newInstance();However, there is a disadvantage. I can not pass arguments to the constructor of the plugin.
public class RainyTheme extends UIPlugin {
  public RainyTheme() {
   // bla bla
  public RainyTheme(int x, int y , int width, int height) {
   // set co-ordinates
   // bla bla
  // bla bla bla bla
}Now if I want to instantiate this plugin at runtime and at the same time I want to pass the 4 arguments as shown in the second constructor, how can I achieve this?

Answer 1

I have no experience with JME and the limitations of its API, but looking at the API docs ( http://java.sun.com/javame/reference/apis.jsp ) it seems that there are two main versions, CLDC and CDC, of which CLDC is more limited in its API.
The Class class does not contain the methods getConstructor(Object[]) or getConstructors() in this version ( http://java.sun.com/javame/reference/apis/jsr139/java/lang/Class.html ), so it seems that if you are using CLDC then there is no way to reflectively call a constructor with parameters. You'd have to find another way to do what you want, such as use the noarg constructor then initialise the instance after construction.