如何自定义异常类?
- 继承于现有的异常结构:RuntimeException、Exception
- 提供全局常量:serialVersionUID
- 提供重载的构造器
package exer;
public class MyException extends RuntimeException{
static final long serialVersionUID=-222222222222222L;
public MyException(){
}
public MyException(String msg){
super(msg);
}
}