Java.lang.NoSuchMethodException when invoke method dynamic

Question

hi!
i have some trouble when i invoked hibernate PO class method dymaic by parameters, here is a piece of code, can someone help me? thanks in advance! please!
String fieldname = field.getName().toLowerCase();
String methodName = "get" + fieldname.replaceFirst(fieldname.substring(0, 1),fieldname.substring(0,1).toUpperCase());
Method methodFinal;
     try {
     methodFinal = value.getClass().getDeclaredMethod(methodName, new Class[] {PaymentPO.class});
     return methodFinal.invoke(value, null);
     } catch (SecurityException e) {
          e.printStackTrace();
     } catch (NoSuchMethodException e) {
          e.printStackTrace();
     } catch (IllegalArgumentException e) {
          e.printStackTrace();
     } catch (IllegalAccessException e) {
          e.printStackTrace();
     } catch (InvocationTargetException e) {
          e.printStackTrace();
     }

Answer 1

I don't know what your error is, but here are a few suggestions:
* print out the method name.
* print out the methods for the class on which you're trying to invoke the method
* rather than trying to use this means of invoking a property getter, look into some of the javabeans introspection classes:
http://java.sun.com/j2se/1.5.0/docs/api/java/beans/Introspector.html
http://java.sun.com/j2se/1.5.0/docs/api/java/beans/BeanInfo.html
http://java.sun.com/j2se/1.5.0/docs/api/java/beans/PropertyDescriptor.html