Java Package Import Alias [duplicate]

Question

Is it possible in Java to import packages and give this package import a specific name?

I currently have a class, which uses some DTO's from a backend and a service package. In both packages the DTO's have the same name. And I think this isn't quite readable:

com.backend.mypackage.a.b.c.d.UserDto userBackend = new com.backend.mypackage.a.b.c.d.UserDto(); com.service.mypackage.a.b.c.d.UserDto userService = new com.service.mypackage.a.b.c.d.UserDto();  mapper(userBackend, userService); 

This is a small example. The class is actually quite complex and has a lot more code in it.

Does Java have something like import com.backend.mypackage.a.b.c.d.UserDto as userDtoBackend so i can shorten my source code?

Answer 1

No, you can not do "import x as y;" in Java.

What you CAN do is to extend the class, or write a wrapper class for it, and import that one instead.

import com.backend.mypackage.a.b.c.d.UserDto;  public class ImportAlias {     static class UserDtoAlias extends com.service.mypackage.a.b.c.d.UserDto {     }      public static void main(String[] args) {         UserDto userBackend = new UserDto();         UserDtoAlias userService = new UserDtoAlias();          mapper(userBackend, userService);     }      private static void mapper(UserDto userBackend, UserDtoAlias userService) {         // ...     } }