java实例代码01

package com.company.imooc_chapter_3;

import java.util.Scanner;

/**
 * Created by junius on 2016/12/13.
 */
public class TestSearch {
    private static Scanner console = new Scanner(System.in);

    public static void main(String[] args){
        String[] books = { "C语言", "数据结构", "汇编语言", "高数", "大学语文", "毛概" };
        while(true){
            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");
            String book;
            try {
                int command =inputCommand();
                switch (command){
                    case 1:
                        book = getBookByName(books);
                        System.out.println("book:"+book);
                        break;
                    case 2:
                        book = getBookByNo(books);
                        System.out.println("book" + book);
                        break;
                    case -1:
                        System.out.println("输入的命令有误，请重新输入!");
                        continue;
                    default:
                        System.out.println("请输入提示中的数字");
                        continue;
                }
                break;
            } catch (Exception e) {
                System.out.println(e.getMessage());

            }
        }
    }

    private static int inputCommand() {
        int command;
        try {
            command = console.nextInt();
            return command;
        } catch (Exception e) {
            console = new Scanner(System.in);
            return -1;
        }
    }

    private static String getBookByNo(String[] books) throws Exception{
        while(true){
            System.out.println("请输入图书序号：");
            try {
                int index =inputCommand();
                if(index==-1){
                    System.out.println("输入的序号错误请重新输入！");
                    continue;
                }
                String book = books[index];
                return book;
            } catch (ArrayIndexOutOfBoundsException ex) {
                Exception bookIsntExist = new Exception("图书不存在");
                bookIsntExist.initCause(ex);
                throw bookIsntExist;
            }
        }
    }

    private static String getBookByName(String[] books) throws Exception{
        System.out.println("请输入书名");
        String name = console.next();
        for(String na:books){
            if(name.equals(na)){
                return na;
            }
        }
        throw new Exception("图书不存在！");
    }
}

package com.company.imooc_chapter_3;

import java.util.Scanner;

/**
 * Created by junius on 2016/12/13.
 */
public class TestSearch {
    private static Scanner console = new Scanner(System.in);

    public static void main(String[] args){
        String[] books = { "C语言", "数据结构", "汇编语言", "高数", "大学语文", "毛概" };
        while(true){
            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");
            String book;
            try {
                int command =inputCommand();
                switch (command){
                    case 1:
                        book = getBookByName(books);
                        System.out.println("book:"+book);
                        break;
                    case 2:
                        book = getBookByNo(books);
                        System.out.println("book" + book);
                        break;
                    case -1:
                        System.out.println("输入的命令有误，请重新输入!");
                        continue;
                    default:
                        System.out.println("请输入提示中的数字");
                        continue;
                }
                break;
            } catch (Exception e) {
                System.out.println(e.getMessage());

            }
        }
    }

    private static int inputCommand() {
        int command;
        try {
            command = console.nextInt();
            return command;
        } catch (Exception e) {
            console = new Scanner(System.in);
            return -1;
        }
    }

    private static String getBookByNo(String[] books) throws Exception{
        while(true){
            System.out.println("请输入图书序号：");
            try {
                int index =inputCommand();
                if(index==-1){
                    System.out.println("输入的序号错误请重新输入！");
                    continue;
                }
                String book = books[index];
                return book;
            } catch (ArrayIndexOutOfBoundsException ex) {
                Exception bookIsntExist = new Exception("图书不存在");
                bookIsntExist.initCause(ex);
                throw bookIsntExist;
            }
        }
    }

    private static String getBookByName(String[] books) throws Exception{
        System.out.println("请输入书名");
        String name = console.next();
        for(String na:books){
            if(name.equals(na)){
                return na;
            }
        }
        throw new Exception("图书不存在！");
    }
}