3.自定义异常

 1 package com.exception.demo02;
 2 
 3 //自定义的异常类：继承Exception
 4 public class MyException extends Exception {
 5 
 6     //传递数字>10;
 7     private int detail;
 8 
 9     public MyException(int a) {
10         this.detail = a;
11     }
12 
13     //toString:异常的打印信息
14     @Override
15     public String toString() {
16         return "MyException{" + detail + ‘}‘;
17     }
18 }

 1 package com.exception.demo02;
 2 
 3 public class Test {
 4 
 5     //可能会存在异常的方法
 6 
 7     static void test(int a) throws MyException {
 8 
 9         System.out.println("传递的参数为：" + a);
10         if (a > 10) {
11             throw new MyException(a);//抛出
12         }
13 
14         System.out.println("OK");
15     }
16 
17 
18     public static void main(String[] args) {
19         try {
20             test(11);
21         } catch (MyException e) {
22             System.out.println("MyException=>" + e);
23         }
24     }
25 
26 }
27 
28 结果：
29 传递的参数为：11
30 MyException=>MyException{11}