Change static element value through reflection with string as element name

I'm getting data from a DB and access through the field names of the class DBUserValues and want to save the results in a DBUserValues object. There is always only one result. How to I access these static variables with a string? Is there a better way to do this?

public class DBUserValues {
    public static String username;
    public static String firstname;
}

Go through results and save them

for (Field field : user.getClass().getDeclaredFields()) {
    // Result should get saved in DBUserValues object
    // DBUserValues.username = result.getString(field.getName();
    // DBUserValues.(field.getName()) = result.getString(field.getName());
}