Get names of the available members of a Java class

Question

I'm trying to get the member names of a class in Java. For instance, let's say I have the class:

class Dog
{
    private int legs = 4;
    private int ears = 2;
}

Is there anyway I can get a list of field names along with their types, such as

{ "legs" : "int", "ears" : "int" }.

Note I wrote the example result in JSON for convenience, but I'm doing it in Java.

what you are asking for is called [reflection](http://docs.oracle.com/javase/tutorial/reflect/index.html) — Oren, Jan 14 '13 at 15:17

score 8 · Accepted Answer · edited Jan 14 '13 at 15:19

8

Use Class#getDeclaredFields(): -

for(Field f : Dog.class.getDeclaredFields()) {
    f.setAccessible(true);
    String name = f.getName();
}

edited Jan 14 '13 at 15:19

Rohit Jain

answered Jan 14 '13 at 15:15

AlexR

score 3 · Answer 2 · answered Jan 14 '13 at 15:17

3

Field[] fields = Dog.class.getFields();

and call getName() for each element

answered Jan 14 '13 at 15:17

Nikolay Kuznetsov

2 Answers2