groundhog.java

经典java书籍《thinking in java（第三版）》的源码

//: c11:Groundhog.java
// Looks plausible, but doesn't work as a HashMap key.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

public class Groundhog {
  protected int number;
  public Groundhog(int n) { number = n; }
  public String toString() {
    return "Groundhog #" + number;
  }
} ///:~