Melissa Dale [https://community.jboss.org/people/mdale] created the discussion "Re: Grabbing an existing class's constructors?" To view the discussion, visit: https://community.jboss.org/message/818976#818976 -------------------------------------------------------------- Thank you for replying, You are right, I do understand the difference between class initialization and object initialization in theory, and what I had posted was an extremely sloppy attempt made in desperation (although I acknowledge it is entirely possible I am failing to keep them separate in practice Instead of using ".isEmpty()" I have used a try/catch, where it tries to create the coupling, and if it fails I assume it's because a ctclass's constructor is not empty. In the catch block I attempt to insert an empty class constructor on the ctclass object (so to overload the constructor) So it's like this: String from_class = from.getName(); //Persistent Coupling if(strength == 'P' || strength == 'p'){ try{ String toBeAdded = from_class + varname+" = new " + from_class+"();"; CtField f = CtField.make(toBeAdded, to); to.addField(f); } //Hopefully this will catch cases where constructors are not empty and insert a dummy instructor catch(Exception e){ from.makeClassInitializer(); String toBeAdded = from_class + varname+" = new " + from_class+"();"; CtField f = CtField.make(toBeAdded, to); to.addField(f); } I still get a 'Exception in thread "main" javassist.CannotCompileException: [source error] no such constructor'. And as I mentioned, ideally I would like to use the getConstructors() on a ctclass to get the array of constructor objects, but this is much fuzzier in my mind. Once I have the array of constructor objects, is there a way to determine the object types? If I can loop through the array I can make a coupling with dummy variables, becasue I don't really care about the program's execution after it it coupled, only that it will compile. Something *roughly* like: CtConstructor [] consts = new CtConstructor[]; ArrayList <?> results = new ArrayList<?>(); for (int i=0; i<consts.length(); i++){           if (consts[i].type == int){                     results[i]=13;           else if (consts[i].type == double){                     results[i] = 13.5;           }           else if (consts[i].type == char){                     results[i] = 'M';           }           else if (consts[i].type == float){                     results[i] = 13.5;           }           else if (consts[i].type == double){                     results[i] = 13.5;           }           else if (consts[i].type == boolean){                     results[i] = 13.5;           }           else{                     results[i]=null;           }           }//for }//method -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/818976#818976] Start a new discussion in Javassist at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]