参考手册

参考手册

实例 Java 私有内部类

​x
 
class OuterClass {
  int x = 10;
​
  private class InnerClass {
    int y = 5;
  }
}
​
public class Main {
  public static void main(String[] args) {
    OuterClass myOuter = new OuterClass();
    OuterClass.InnerClass myInner = myOuter.new InnerClass();
    System.out.println(myInner.y + myOuter.x);
  }
}
​
                    

输出结果

Main.java:13: error: OuterClass.InnerClass has private access in OuterClass
    OuterClass.InnerClass myInner = myOuter.new InnerClass();
              ^
Main.java:13: error: OuterClass.InnerClass has private access in OuterClass
    OuterClass.InnerClass myInner = myOuter.new InnerClass();
                                                ^
2 errors