Can you choose methods depending on your constructor input?

Question

I'd like to be able to impliment certain method sets, depending on constructor imput. Is there any such thing in java that lets you build a class' methods dynamically...or at least kill/switch/create methods after it's instantiated?
thanks for any insight :)

Answer 1

That's a vague statement, but it sounds like you want to write a factory method that instantiates different classes depending on the parameter values:
public Runnable createRunner(X y, Y y, Z z) {
    if  (...)
        return new Jogger(...);
    else
        return new Limper(...);
}