异常处理小练习

 1 package day1_31;
 2 
 3 /**
 4  * 异常处理小练习
 5  */
 6 public class ExceptionTest {
 7     public static void main(String[] args){
 8         try {
 9             String[] arr = {"13","6"};
10             int result = method(arr);
11             System.out.println(result);
12         } catch (Exception e) {
13             System.out.println(e.getMessage());
14         }
15     }
16 
17     public static int method(String[] args) throws RuntimeException {
18         if (args.length != 2) {
19             throw new ArrayIndexOutOfBoundsException("没有输入两个数字");
20         }
21         int one;
22         int two;
23         try {
24             one = Integer.parseInt(args[0]);
25             two = Integer.parseInt(args[1]);
26         } catch (NumberFormatException e) {
27             throw new NumberFormatException("没有输入数字类型");
28         }
29 
30         if (two == 0) {
31             throw new ArithmeticException("被除数不能为0");
32         }
33 
34         if (one < 0 || two < 0) {
35             throw new MyException("不能输入负数");
36         }
37 
38         return one/two;
39     }
40 }

自定义异常类MyException

 1 package day1_31;
 2 
 3 public class MyException extends RuntimeException {
 4     static final long serialVersionUID = -3387513124229948L;
 5 
 6     public MyException() {
 7         super();
 8     }
 9 
10     public MyException(String message) {
11         super(message);
12     }
13 
14 }