Reflection and runtime class to get method

Question

Actually in all my class, i alway have attribute name

Class clazz, Object obj

When we know the object type, we can do something like (if id is a attribute....)

Integer id = ((BaseObj) field.get(obj)).getId();

Actually

field.get(obj))

return me a object, i search to get value of name attribute of this object.

I search to do something like

String name = ((clazz.getClass()) field.get(obj)).getName();

That cannot possibly work, since the compiler still wouldn't know that getName() exists. — SLaks
– SLaks, Commented Nov 16, 2017 at 16:48

f1sh · Accepted Answer · 2017-11-16 15:50:38Z

1

You cannot cast to a class that's only known at runtime. Either make all these classes implement an interface with a getName() method or you'll have to resort to reflection:

String name = (String) clazz.getMethod("getName").invoke(obj);

answered Nov 16, 2017 at 15:50

f1sh

12k3 gold badges31 silver badges53 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Reflection and runtime class to get method

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related