Call GetName method based on name

The problem is, I see a way to call the GetName () method based on name names.
The implementation of the method is then implemented using the judgment of the string
The code is as follows:

Public Object Getorderby () {
        if (order_title.equals (this.ordered)) {return
            getTitle ();
        } else if (Order_ Renderdate.equals (this.ordered)) {return
            getrenderdate ();
        } else if (Order_createdate.equals (this.ordered) ) {return
            getcreatedate ();
        } else if (order_lastmodified.equals (this.ordered)) {return
            getlastmodified ();
        } else {return
            getTitle ();
        }
    }

That way, if you add a Get method later, it means adding the Getorderby () method to the decision.
So I decided to use class reflection to transform this method, first defining a Dogetmethod method

Private Object Dogetmethod (String methodname) throws Exception {
        object result = null;
        object[] eo = new object[] {};
        String getmethodname = "Get" + methodname.tolowercase ();
        Method[] methods = GetClass (). GetMethods ();
        for (int i = 0; i < Methods.length i++) {method method
            = Methods[i];
            if (Getmethodname.equals (Method.getname (). toLowerCase ())) {Result
                = Method.invoke (this, EO);
            }
        return result;
    }

The getmethodname is synthesized from the MethodName group, then the method is found in method[], and then invoked with Invoke.
The argument to invoke this method is that the first argument is the class that specifies the containing method, and the second parameter is the parameter required by the specified method.
Finally modify the original Getorderby

Public Object Getorderby () {
        Object obj = GetTitle ();
        try {
            obj = Dogetmethod (getordered ());
        } catch (Exception e) {return
            obj;
        }
        return obj;
    }