java实例代码01 

 1 package com.company.imooc_chapter_3;
 2 
 3 import java.util.Scanner;
 4 
 5 /**
 6  * Created by junius on 2016/12/13.
 7  */
 8 public class TestSearch {
 9     private static Scanner console = new Scanner(System.in);
10 
11     public static void main(String[] args){
12         String[] books = { "C语言", "数据结构", "汇编语言", "高数", "大学语文", "毛概" };
13         while(true){
14             System.out.println("输入命令：1-按照名称查找图书，2-按照序号查找图书");
15             String book;
16             try {
17                 int command =inputCommand();
18                 switch (command){
19                     case 1:
20                         book = getBookByName(books);
21                         System.out.println("book:"+book);
22                         break;
23                     case 2:
24                         book = getBookByNo(books);
25                         System.out.println("book" + book);
26                         break;
27                     case -1:
28                         System.out.println("输入的命令有误，请重新输入!");
29                         continue;
30                     default:
31                         System.out.println("请输入提示中的数字");
32                         continue;
33                 }
34                 break;
35             } catch (Exception e) {
36                 System.out.println(e.getMessage());
37 
38             }
39         }
40     }
41 
42     private static int inputCommand() {
43         int command;
44         try {
45             command = console.nextInt();
46             return command;
47         } catch (Exception e) {
48             console = new Scanner(System.in);
49             return -1;
50         }
51     }
52 
53     private static String getBookByNo(String[] books) throws Exception{
54         while(true){
55             System.out.println("请输入图书序号：");
56             try {
57                 int index =inputCommand();
58                 if(index==-1){
59                     System.out.println("输入的序号错误请重新输入！");
60                     continue;
61                 }
62                 String book = books[index];
63                 return book;
64             } catch (ArrayIndexOutOfBoundsException ex) {
65                 Exception bookIsntExist = new Exception("图书不存在");
66                 bookIsntExist.initCause(ex);
67                 throw bookIsntExist;
68             }
69         }
70     }
71 
72     private static String getBookByName(String[] books) throws Exception{
73         System.out.println("请输入书名");
74         String name = console.next();
75         for(String na:books){
76             if(name.equals(na)){
77                 return na;
78             }
79         }
80         throw new Exception("图书不存在！");
81     }
82 }
 1 package com.company.imooc_chapter_3;
 2 
 3 import java.util.Scanner;
 4 
 5 /**
 6  * Created by junius on 2016/12/13.
 7  */
 8 public class TestSearch {
 9     private static Scanner console = new Scanner(System.in);
10 
11     public static void main(String[] args){
12         String[] books = { "C语言", "数据结构", "汇编语言", "高数", "大学语文", "毛概" };
13         while(true){
14             System.out.println("输入命令：1-按照名称查找图书，2-按照序号查找图书");
15             String book;
16             try {
17                 int command =inputCommand();
18                 switch (command){
19                     case 1:
20                         book = getBookByName(books);
21                         System.out.println("book:"+book);
22                         break;
23                     case 2:
24                         book = getBookByNo(books);
25                         System.out.println("book" + book);
26                         break;
27                     case -1:
28                         System.out.println("输入的命令有误，请重新输入!");
29                         continue;
30                     default:
31                         System.out.println("请输入提示中的数字");
32                         continue;
33                 }
34                 break;
35             } catch (Exception e) {
36                 System.out.println(e.getMessage());
37 
38             }
39         }
40     }
41 
42     private static int inputCommand() {
43         int command;
44         try {
45             command = console.nextInt();
46             return command;
47         } catch (Exception e) {
48             console = new Scanner(System.in);
49             return -1;
50         }
51     }
52 
53     private static String getBookByNo(String[] books) throws Exception{
54         while(true){
55             System.out.println("请输入图书序号：");
56             try {
57                 int index =inputCommand();
58                 if(index==-1){
59                     System.out.println("输入的序号错误请重新输入！");
60                     continue;
61                 }
62                 String book = books[index];
63                 return book;
64             } catch (ArrayIndexOutOfBoundsException ex) {
65                 Exception bookIsntExist = new Exception("图书不存在");
66                 bookIsntExist.initCause(ex);
67                 throw bookIsntExist;
68             }
69         }
70     }
71 
72     private static String getBookByName(String[] books) throws Exception{
73         System.out.println("请输入书名");
74         String name = console.next();
75         for(String na:books){
76             if(name.equals(na)){
77                 return na;
78             }
79         }
80         throw new Exception("图书不存在！");
81     }
82 }

 

posted @ 2016-12-13 14:52  zhuzhuqwa  阅读(194)  评论(0)    收藏  举报