Java异常抛出及try，catch应用实例详解编程语言

 1 class lanpingException extends Exception 
 2 { 
 3     lanpingException(String msg) 
 4     { 
 5         super(msg); 
 6     } 
 7 } 
 8  
 9 class maoyanException extends Exception 
10 { 
11     maoyanException(String msg) 
12     { 
13         super(msg); 
14     } 
15 } 
16  
17 class Computer 
18 { 
19     private int state=2; 
20     public void run()throws lanpingException,maoyanException 
21     { 
22         if(state==1) 
23         { 
24             throw new lanpingException("lanping!!!"); 
25         } 
26         if(state==2) 
27         { 
28             throw new maoyanException("maoyan!!!"); 
29         } 
30         System.out.println("run bat"); 
31     } 
32     public void reset() 
33     { 
34         state=0; 
35         System.out.println("computer reset!"); 
36     } 
37 } 
38  
39 class Teacher 
40 { 
41     private String name; 
42     private Computer comp; 
43     Teacher(String name) 
44     { 
45         this.name=name; 
46         comp=new Computer(); 
47     } 
48     public void prelect()throws maoyanException 
49     { 
50         try 
51         { 
52             comp.run(); 
53             System.out.println(name+" speak"); 
54         } 
55         catch(lanpingException e) 
56         { 
57             System.out.println(e.toString()); 
58             comp.reset(); 
59             prelect(); 
60         } 
61         catch(maoyanException e) 
62         { 
63             System.out.println(e.toString()); 
64             test(); 
65             throw e; 
66         } 
67     } 
68     public void test() 
69     { 
70         System.out.println("test yourself!"); 
71     } 
72 } 
73  
74 class Kandra 
75 { 
76     public static void main(String[] args) 
77     { 
78         Teacher pp=new Teacher("cao"); 
79         try 
80         { 
81             pp.prelect(); 
82              
83         } 
84         catch(maoyanException e) 
85         { 
86             System.out.println("......"); 
87         } 
88     } 
89 }