How get fields of hierarchy fields of java classes?

Question

I have a abstract class called ClassA in my java project. I extends ClassB from ClassA. Now I want to get all fields of ClassB. When I use ClassB.getDelaredFields(), this method get only classB fields. I can use ClassA.getDeclaredFields() but When I have several hierarchical clasess, I cant use it. I want to get all of fields dymcmically. How?

can you post your code ? so that all can know exact scenario ? — Vishal Gajera, Dec 03 '15 at 07:01
iterate through all superclasses and add their declared fields until superclass is java.lang.Object — Jörn Buitink, Dec 03 '15 at 07:05
pleas refer to [here](http://stackoverflow.com/questions/16966629/what-is-the-difference-between-getfields-and-getdeclaredfields-in-java-reflectio) — Roger Dwan, Dec 03 '15 at 07:08

score 0 · Answer 1 · answered Dec 03 '15 at 07:41

0

You can use getFields(), here is example :

public class Generic {
    public class SuperA {
        public int f0;
    }

    public class A extends SuperA{
        public int f;
    }

    public class B extends A {

    }

    public static void main(String[] args) {
        Field[] fields = B.class.getFields();

        for(Field f: fields) {
            System.out.println(f.getName());
        }
    }
}

answered Dec 03 '15 at 07:41

Eldar Budagov

312
2
11

1

You're assuming fields will be `public`. – Sotirios Delimanolis Dec 03 '15 at 15:36

score 0 · Answer 2 · answered Dec 03 '15 at 07:57

public variables (from the class and inherited):

Field[] fields = yourclass.getFields();

every variables non inherited, public and private:

Field[] fields2 = yourclass.getDeclaredFields();

to get the inherited, protected (what can you do with them ?), iterate through superclass

yourclass.getSuperclass()

How get fields of hierarchy fields of java classes?

2 Answers2