在自定義異常里面，在有參的構(gòu)造方法中會有這么一句super(message);舉個(gè)例子，public class NoexistException extends Exception { public NoexistException () {}; public NoexistException (String message) {?????????????????????super(message); }}我發(fā)現(xiàn)，我去掉super(message);程序運(yùn)行的結(jié)果沒什么不一樣啊。public static void warn() throws NoexistException {? throw new NoexistException("圖書不存在！"); }?求大神解答