Android - Getting wrapper class from primitive class

guys.

I've found this code

Class<?> fieldClass = null;
    if (field.getType().isPrimitive()) {
        fieldClass = ClassUtils.primitiveToWrapper(field.getType());
    }

ClassUtils isn't recognized, so I imported

import org.springframework.util.ClassUtils;

after dowloading it from the repos.

Now I need to find a way to get the wrapper from the primitive Class, I've read the documentation of Spring, but I found nothig.

Can you guys help me?