JAVA值得注意继承简单例子..

class Base{int i = 47;private int f(){ System.out.println("Base f()");System.out.println(this);return i ;} int g(){ System.out.println("Base g()");  System.out.println(this);   // this Derived@...return f() ;  }int k(){return i ;}}class Derived extends Base {int i = 27;int f(){return i ;}}public class Test{public static void main(String[] args){Base d = new Derived(); System.out.println(d);  //Derived@..   System.out.println(d.k()); // print  47 System.out.println(d.g()); // print 47;}}