第15题: [单项选择]对于try和catch子句的排列,下列各项中正确的是( )。 A. 子类异常在前,父类异常其后 B. 父类异常在前,子类异常其后 C. 先有子类,其他如果排列都无关 D. 有继承关系的异常不能在同一个try程序段内 参考答案:A 答案解析:[解析] Java语言中,在捕获父类异常时对其子类异常也捕获了,根据try和catch的匹配原则,尽量使用一个父类去捕获其所有子类的异常,所以A选项描述的子类异常在前,父类异常其后是正确的。
第19题: [单项选择]Paul was ordered to pay Clara $600 because A. he had borrowed $600 from her. B. he had broken his word to marry her. C. he had promised to give her $600. D. he had spent a lot of her money. 参考答案:B