[java] access to member in composition

[mickey]

//a.class
public class A {
	private static enum Day { Sun, Mon, Tue }
        private B b;
       public A (B cb) {  b = cb; }
       friend B; //exists??
}
//b.class
public class B {
   public B () { }
   private int DoSomething () {
        // here I have to acces to enum Day like switch (Day) ; but from here
  }
}

//a.class
public class A {
	private static enum Day { Sun, Mon, Tue }
        private B b;
       public A (B cb) {  b = cb; }
       friend B; //exists??
}
//b.class
public class B {
   public B () { }
   private int DoSomething () {
        // here I have to acces to enum Day like switch (Day) ; but from here
  }
}

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Does it exists a keyword like "friend" to do this? Or Anyone can suggest me anything better!?

Furthermore: is it possibile something like C ? (= 0 I mean)

private static enum Day { Sun=0, Mon=1, Tue=2 }

private static enum Day { Sun=0, Mon=1, Tue=2 }

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thanks