异常知识点求帮助 super(msg);为什么会报错呢

Question

package cn.campsg.java.experiment.exception;public class RoseException {              public RoseException(){                         super();              }             public RoseException(String msg){                         super(msg);              }  }为什么super（msg）;会报错？?

Answer 1

public class RoseException extends Exception{ 
             public RoseException(){  
                       super(); //这里是调用父类的构造方法 就必须实现继承
             }
             public RoseException(String msg){  
                       super(msg);//这里是调用父类的构造方法 就必须实现继承
             }
  }

Answer 2

一般类默认是继承Object的，object类中没有一个有带参的构造函数吧？你是要写异常类，我没有记错的话Exception是有一个，你得先继承Exception ，public class RoseException extends Exception