orc.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 37 行

//: reusing/Orc.java
// The protected keyword.
import static net.mindview.util.Print.*;

class Villain {
  private String name;
  protected void set(String nm) { name = nm; }
  public Villain(String name) { this.name = name; }
  public String toString() {
    return "I'm a Villain and my name is " + name;
  }
}	

public class Orc extends Villain {
  private int orcNumber;
  public Orc(String name, int orcNumber) {
    super(name);
    this.orcNumber = orcNumber;
  }
  public void change(String name, int orcNumber) {
    set(name); // Available because it's protected
    this.orcNumber = orcNumber;
  }
  public String toString() {
    return "Orc " + orcNumber + ": " + super.toString();
  }	
  public static void main(String[] args) {
    Orc orc = new Orc("Limburger", 12);
    print(orc);
    orc.change("Bob", 19);
    print(orc);
  }
} /* Output:
Orc 12: I'm a Villain and my name is Limburger
Orc 19: I'm a Villain and my name is Bob
*///:~