实训SI

 1 package bbb;
 2 
 3 import java.util.Scanner;
 4 
 5 public class ccc {
 6     public static void main(String [] argc){
 7         int x,y,num;
 8         Scanner in = new Scanner(System.in);
 9         System.out.print("请输入两个数据:");
10         x = in.nextInt();
11         y = in.nextInt();
12         try{
13             num=x/y;
14         }catch(Exception e){
15             e.printStackTrace();
16             System.out.println("除数不能为零");
17         }
18         finally{            
19             System.out.println();
20         }
21     }
22 
23 }

 1 package bbb;
 2 
 3 import java.util.Scanner;
 4 
 5 public class nida {
 6 
 7     public static void main(String[] args) {
 8         // TODO 自动生成的方法存根
 9         double r,num;
10         System.out.print("请输入圆的半径：");
11         Scanner in = new Scanner(System.in);
12         r = in.nextDouble();
13         try{
14                 num = 3.14*r*r;
15                 System.out.println(num);
16         }catch(Exception e){
17             e.printStackTrace();
18         }                    
19     }
20 
21 }

 1 package bbb;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Myexcep extends Exception{
 6     public Myexcep(String ErrorMessage){
 7         super(ErrorMessage);
 8     }
 9 public class Tran{
10     String avg(String s) throws Myexcep{
11         if(s.length()!=18){
12             throw new Myexcep("不是18个数字");
13         }
14         return s;
15     }
16 }
17     public static void main(String[] args) {
18         // TODO 自动生成的方法存根
19          String id;
20          System.out.print("请输入身份证号码：");
21          Scanner in = new Scanner(System.in);
22          id =in.nextLine();
23          try{
24              //System.out.print("身份证号码为：");
25              System.out.print(avg(id));
26          }catch(Exception e){
27              //e.printStackTrace();
28              System.out.println(e);
29          }
30     }
31     private static String avg(String id) throws Myexcep {
32         String s = id;
33         // TODO 自动生成的方法存根
34         if(s.length()!=18){
35             throw new Myexcep("不是18个数字");
36         }
37         System.out.print("身份证号码为：");
38         return s;
39     }
40     
41 }