黑马程序员——异常总结

 1 package blogtest4;
 2 /*
 3  * 自定义异常类
 4  */
 5   class EceptionTest1
 6   {
 7    public static void main(String args[])
 8    {
 9     Demo demo = new Demo();
10     try
11     {
12      demo.div(1,-1,3);
13     }
14     catch(ChuShuException e)
15     {
16      System.out.println(e.toString());
17     }
18          
19     catch (ArithmeticException e)
20     {
21      System.out.println(e.toString());
22     }
23     catch (ArrayIndexOutOfBoundsException  e)
24     {
25      System.out.println(e.toString());
26     }
27    }
28   }
29   class Demo
30   {
31    public int div(int a,int b,int c)throws ChuShuException,ArithmeticException,ArrayIndexOutOfBoundsException
32    {
33     int[] arr = new int[]{1,2,3,4};
34     System.out.println(arr[c]);
35     if(b<0)
36      throw new ChuShuException("chushu wei fushu");
37     return a/b;
38    }
39   }
40   class ChuShuException extends Exception
41   {
42    ChuShuException(String mes)
43    {
44     super(mes);
45    }
46   }

 1 练习
 2 package blogtest4;
 3 public class EceptionTest2 {
 4  /**
 5   * 自定义RuntimeExcption子类异常
 6   */
 7  public static void main(String[] args) {
 8   new RuntimeTest().ChuShu(4,-1);
 9  }
10 }
11 class RuntimeExceptionTest extends RuntimeException
12 {
13  RuntimeExceptionTest(String a)
14  {
15   super(a);
16  }
17  
18 }
19 class RuntimeTest
20 {
21  int ChuShu(int a,int b)
22  {
23   if(b<0)
24   throw new RuntimeExceptionTest("xiao yu ling");
25   return a/b;
26  }
27 }