Interface private & "default" added by javac

[Remi Forax]

< Was sent to the wrong mailing list > 

default is a keyword in Java the Language but it doesn't exist at bytecode level (non abstract is enough), 
so it seems you decompiler add the keyword default for every methods non-abstract in an interface, 
your compiler is wrong. 

If you use javap -private InterfacePrivateMethod.class, you get 
Compiled from "InterfacePrivateMethod.java" 
public interface InterfacePrivateMethod { 
public void foo(); 
private void print(); 
} 

cheers, 
Rémi 

> De: "Ionut" <ionutb83 at yahoo.com>
> À: "hotspot compiler" <hotspot-compiler-dev at openjdk.java.net>, "Ionut B"
> <ionutb83 at yahoo.com>
> Envoyé: Samedi 14 Avril 2018 14:03:21
> Objet: Interface private & "default" added by javac

> Hello All,

> I have an initial interface containing one default and one private method:

> public interface InterfacePrivateMethod {
> default void foo(){
> print();
> }
> private void print() {
> System.out.println("Private Method");
> }
> }

> After I compile it with javac and then decompile, the class I get looks like:

> public interface InterfacePrivateMethod {
> default void foo() {
> this.print();
> }
> private default void print() { // private default !?
> System.out.println("Private Method");
> }
> }

> Basically javac inserts default in the private method signature.

> Could you please provide more details about this, why is that?
> At the Java source code level a private method cannot be default in the same
> time inside an Interface.

> Thanks a lot,
> Ionut
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