JCH
Java Community | Help. Code. Learn.•4mo ago
Franscis123$#

Sealed classes actually need `permits` if are in the same package?

I'm using Java 24. Sealed classes need permits if they and the inheritors are in the same package? I would to do it without specify the classes in my interface, if it's possible automatically detect the inheritors in the package. 
 package com.latteIceCream.latte.dto;

 public sealed interface DTO<ID> { ID altId(); } Sealed type DTO lacks a permit clause and no type from the same compilator unit declares DTO as its direct supertype
 package com.latteIceCream.latte.dto;

 public sealed interface DTO<ID> { ID altId(); } Sealed type DTO lacks a permit clause and no type from the same compilator unit declares DTO as its direct supertype
 package com.latteIceCream.latte.dto;

 public record ProductDTO(String name) implements DTO<String> The type ProductDTO that implements the sealed interface DTO<String> should be a permitted subtype of DTO<String>

 { @Override public String altId() { return name; } } 
 package com.latteIceCream.latte.dto;

 public record ProductDTO(String name) implements DTO<String> The type ProductDTO that implements the sealed interface DTO<String> should be a permitted subtype of DTO<String>

 { @Override public String altId() { return name; } }
I heard it can pick the classes in the package in common as permitted, I hope is true 🫠.
1 Reply
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JavaBot•4mo ago
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