Setting Fields value via reflection

Question

I'm starting from a c# code:
          internal void RefreshFromObject(object objFromUpdate)
               if (this.GetType()==objFromUpdate.GetType())
                    PropertyInfo[] fieldsFrom = objFromUpdate.GetType().GetProperties();
                    PropertyInfo[] fieldsThis = this.GetType().GetProperties();
                    for(int idxProp=0; idxProp<fieldsFrom.Length;idxProp++)
                         if (fieldsThis[idxProp].CanWrite && fieldsFrom[idxProp].CanRead)
                              fieldsThis[idxProp].SetValue(this, fieldsFrom[idxProp].GetValue(objFromUpdate,null),null);
               else
                    throw new ObjectTypeNotValidException("Object type from which update current instance not valid. Use same type.");
Now I have to translate it in Java:
Class clazz = objFromUpdate.getClass();
Class thisClazz = this.getClass();
do {
     Field[] fieldsFrom = clazz.getDeclaredFields();
     Field[] fieldsThis = thisClazz.getDeclaredFields();
     try {
          fieldsThis[idxProp].set(thisClazz, fieldsFrom[idxProp].get(clazz));
     catch (IllegalAccessException iaccEx) {
          System.out.println("IllegalAccessException");
     catch (IllegalArgumentException iaccEx) {
          System.out.println("IllegalArgumentException");
clazz = clazz.getSuperclass();
thisClazz = thisClazz.getSuperclass();
} while (clazz != null && clazz != Object.class);
My problem is that I don't know if the field type is one of primitive, for which I should use the particular setters and getters.
My questions are:
1) is there in Java a more elegant way to set fields values via reflection?
2) how can I know if a field i changable (equivalent to the method CanWrite of c#?
Thanks a lot to each one that will answer me.
Marco

Answer 1

Hi georgemc,
thanks for replying. I-m new with java forum, so I don't know if it is correct the code tags...
Anyway... the problem is that the Field of reflected object could be both of Object types or primitive types. So I cannot use the general method "set" when changing Field's value.
Maybe somebody else had the same problem...
Seems in C# it is a very easy thing... not in java :(
Marco
Class clazz = objFromUpdate.getClass();
Class thisClazz = this.getClass();
do {
Field[] fieldsFrom = clazz.getDeclaredFields();
Field[] fieldsThis = thisClazz.getDeclaredFields();
try {
fieldsThis[idxProp].set(thisClazz, fieldsFrom[idxProp].get(clazz));
catch (IllegalAccessException iaccEx) {
System.out.println("IllegalAccessException");
catch (IllegalArgumentException iaccEx) {
System.out.println("IllegalArgumentException");
clazz = clazz.getSuperclass();
thisClazz = thisClazz.getSuperclass();
} while (clazz != null && clazz != Object.class);