Question

I’m using this code to get all fields associated with an Object. The Object in question has three super classes, and other classes extend from this object.

for (Field f : this.getClass().getFields()){
    try{
        fieldName = f.getName();
        fieldType = f.getType().toString();
        //Do more stuf
    }

I do not want to get the fields associated with the super classes, but I want all fields in the current class and all those that may extend from it.

How do I filter out which fields are the ones I need?

Answer 1

For each Field you can use getDeclaringClass() to determine the class that declared the field, so if you have a hierarchy like

A
|
B
|
C
|\
D E

and you want only fields declared in C, D or E, then you can say

for (Field f : this.getClass().getFields()){
  if(C.class.isAssignableFrom(f.getDeclaringClass())) {
    // f was declared by C or one of its subclasses

If this is an instance of C you’ll get just the public fields of C, if this is a D you’ll get the public fields of C and D, if this is an A or B you’ll get no fields at all.