如何将类的一个参数的值复制到另一个Collection对象？

class ResourceDTO {
      String resourceName;
      List<AssociateResource> associateResource = new ArrayList<AssociateResource>;
      // getter-setter...
}


class AssociateResource {
      String associateName;
      // other attributes...
      // getter-setters...
}
class ResourceDTO {
      String resourceName;