lostmessage.java

java的异常部分ppt

//: c10:LostMessage.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// How an exception can be lost.

class VeryImportantException extends Exception {
  public String toString() {
    return "A very important exception!";
  }
}

class HoHumException extends Exception {
  public String toString() {
    return "A trivial exception";
  }
}

public class LostMessage {
  void f() throws VeryImportantException {
    throw new VeryImportantException();
  }
  void dispose() throws HoHumException {
    throw new HoHumException();
  }
  public static void main(String[] args)
      throws Exception {
    LostMessage lm = new LostMessage();
    try {
      if(false)lm.f();
    } catch(VeryImportantException e){
      lm.dispose();
    }
  }
} ///:~