Java 从多层嵌套中访问内部类的成员

一个内部类被嵌套多少层并不重要--它能透明地访问所有它能嵌入的外围类的所有成员

 

//: innerclasses/MultiNestingAccess.java
// Nested classes can access all members of all
// levels of the classes they are nested within.
package object;
class MNA {
  private void f() {}
  class A {
    private void g() {}
    public class B {
      void h() {
        g(); //in class A 调用 g(),f(), 完全不需要任何条件
        f();
      }
    }
  }
}    

public class MultiNestingAccess {
  public static void main(String[] args) {
    MNA mna = new MNA();
    MNA.A mnaa = mna.new A();
    MNA.A.B mnaab = mnaa.new B();
    mnaab.h();
  }
} ///:~