【正确答案】class Excp1 extends Exception
{ }
class Excp2 extends Excp1
{ }
public class ExceptionExam7
{
public static void main(String [] args) throws Exception
{
try
{
throw new Excp2();
}
catch(Excp2 e)
{
System.out.println("catch1");
throw new Excp1();
}
catch(Excp1 e)
{
System.out.println("catch2");
throw new Exception();
}
catch(Exception e)
{
System.out.println("catch3");
}
finally
{
System.out.println("finally");
}
}
}
说明： 自定义异常类，关键是选择继承的超类——必须是Exception或者其子类。用异常代表错误，而不要再使用方法返回值。
【答案解析】