fork download
copy 
  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		Optional<UserDTO> user = Optional.of(new UserDTO(null));
  13. 		user.ifPresent(u -> {
  14. 			u.getGroup().orElseThrow(() -> new EntityNotFoundException("Grupo não encontrado"));
  15. 		});
  16. 	}
  17.  
  18. 	public static class EntityNotFoundException extends RuntimeException { 
  19.     	public EntityNotFoundException(String message) {
  20.     		super(message);
  21.     	}
  22. 	}
  23.  
  24. 	public static class UserDTO {
  25. 		private GroupEntity group;
  26.  
  27. 		public UserDTO(GroupEntity group) {
  28. 			this.group = group;
  29. 		}
  30.  
  31. 		public Optional<GroupEntity> getGroup() {
  32. 			return Optional.ofNullable(this.group);
  33. 		}
  34. 	}
  35.  
  36. 	public static class GroupEntity {
  37.  
  38. 	}
  39. }
Runtime error #stdin #stdout #stderr 0.19s 33340KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
stderr
copy 
Exception in thread "main" Ideone$EntityNotFoundException: Grupo não encontrado
	at Ideone.lambda$null$0(Main.java:14)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at Ideone.lambda$main$1(Main.java:14)
	at java.util.Optional.ifPresent(Optional.java:159)
	at Ideone.main(Main.java:13)
https://ideone.com/HFLNBf
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!