自訂異常throw，自訂throw

自訂異常throw，自訂throw

簡單自訂一個年齡小於等於0，或者大於120會出現的異常

首先繼承父類Exception，調用父類的構造器，這樣才可以報出自己想要的異常

public class AgeException extends Exception {    /**     *      */    private static final long serialVersionUID = 1L;    public AgeException(String message) {        super(message);    }}

然後進行小小的測試

 1 package com.lianxi.zidingyichang; 2  3 public class Test { 4     private int age; 5  6     public int getAge() { 7         return age; 8     } 9 10     public void setAge(int age) {11         this.age = age;12     }13 14     public void ageException(int age) throws AgeException {15         if (age > 0 && age <= 120) {16             this.age = age;17             System.out.println("格式正確");18         } else {
                //拋出自己自訂異常19             AgeException exception = new AgeException("請輸入正確年齡");20             throw exception;21         }22     }23 24     public static void main(String[] args) {25         Test test = new Test();26         try {27             test.ageException(120);28         } catch (AgeException e) {29             // TODO Auto-generated catch block30             e.printStackTrace();31         }32     }33 34 }