Java示例用户定义的异常

class MyException extends Exception {

   String s1;

   MyException(String s2) {

      s1 = s2;

   }

   @Override

   public String toString() {

      return ("Output String = "+s1);

   }

}

public class NewClass {

   public static void main(String args[]) {

      try {

         throw new MyException("Custom message");

      } catch(MyException exp) {

         System.out.println(exp);

      }

   }

}