Java代码中的嵌套Scala单例

我有以下Scala(2.8)代码:

object A {
  val message = "hello"
  object B {
    val message = "world"
  }
}

public class C {
  public static String message() {
    return "HELLO";
  }
  public static class D {
    public static String message() {
      return "WORLD";
    }
  }
}

当我从Scala给他们打电话时,他们的工作正如我所期望的:

scala> A.message  
res0: java.lang.String = hello

scala> A.B.message
res1: java.lang.String = world

scala> C.message  
res2: java.lang.String = HELLO

scala> C.D.message
res3: java.lang.String = WORLD

System.out.println(A.message());
System.out.println(A.B.message()); // cannot find ... symbol  : variable B ...
System.out.println(C.message());
System.out.println(C.D.message());

很明显,当我用 javap . 我知道我可以用

System.out.println(A$B$.MODULE$.message());

val getB = B 给我的 A 对象并将第二行替换为

System.out.println(A.getB().message());