How change final class to abastract class?

[diogo.capistrano]

How change final class to abastract class?
Example:
FinalClass.class

public final class FinalClass {}

to

AbstractClass

public abstract class AbstractClass{}

[diogo.capistrano]

Solutions:

CtClass clazz = classPool.get("SOMECLASS");
clazz.setModifiers(Modifier.ABSTRACT);