摘要： 1 package cn.tju.thinkinginjava.exception; 2 3 @SuppressWarnings("serial") 4 class BaseballException extends Exception {} 5 @SuppressWarnings("serial") 6 class Foul extends BaseballException {} 7 @SuppressWarnings("serial") 8 class Strike extends BaseballException {} 9 阅读全文