hide.java

Java编程思想 第六课 全源码

//: c06:Hide.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Overloading a base-class method name
// in a derived class does not hide the
// base-class versions.

class Homer {
  char doh(char c) {
    System.out.println("doh(char)"+c);
    return 'd';
  }
  float doh(float f) {
    System.out.println("doh(float)"+f);
    return 1.0f;
  }
}

class Milhouse {
	//System.out.println("Class Milhouse");
}

class Bart extends Homer {
  void doh(Milhouse m) {System.out.println("Milhouse m");}
}

class Hide {
  public static void main(String[] args) {
    Bart b = new Bart();
    b.doh(1); // doh(float) used
    b.doh('x');
    b.doh(1.0f);
    b.doh(new Milhouse());
  }
} ///:~