hide.java

Java编程思想第三版,作者书中全部原代码,

//: c06:Hide.java
// Overloading a base-class method name in a derived class
// does not hide the base-class versions.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import com.bruceeckel.simpletest.*;

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

class Milhouse {}

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

public class Hide {
  private static Test monitor = new Test();
  public static void main(String[] args) {
    Bart b = new Bart();
    b.doh(1);
    b.doh('x');
    b.doh(1.0f);
    b.doh(new Milhouse());
    monitor.expect(new String[] {
      "doh(float)",
      "doh(char)",
      "doh(float)",
      "doh(Milhouse)"
    });
  }
} ///:~