自定义异常throw

简单自定义一个年龄小于等于0，或者大于120会出现的异常

首先继承父类Exception，调用父类的构造器，这样才可以报出自己想要的异常

public class AgeException extends Exception {

    /**
     *
     */
    private static final long serialVersionUID = 1L;

    public AgeException(String message) {
        super(message);
    }

}

然后进行小小的测试

 package com.lianxi.zidingyichang;

 public class Test {
     private int age;

     public int getAge() {
         return age;
     }

     public void setAge(int age) {
         this.age = age;
     }

     public void ageException(int age) throws AgeException {
         if (age > 0 && age <= 120) {
             this.age = age;
             System.out.println("格式正确");
         } else {
                //抛出自己自定义异常
             AgeException exception = new AgeException("请输入正确年龄");
             throw exception;
         }
     }

     public static void main(String[] args) {
         Test test = new Test();
         try {
             test.ageException(120);
         } catch (AgeException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }

 }