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 }
