In a class hierarchy, private members remain private to their class. : Access Control « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. Access Control

//   This program contains an error and will not
//   compile.
   
class A {
  int i; // public by default
  private int j; // private to A
   
  void setij(int x, int y) {
    i = x;
    j = y;
  }
}
   
class B extends A {
  int total;
  void sum() {
    total = i + j; // ERROR, j is not accessible here
  }
}
   
class Access {
  public static void main(String args[]) {
    B subOb = new B();
   
    subOb.setij(10, 12);
   
    subOb.sum();
    System.out.println("Total is " + subOb.total);
  }
}