ArrayList的應用：圖書管理系統多功能版

第一個檔案：主函式和添加圖書，洗掉圖書，查看圖書，修改圖書，查看圖書借閱狀態，借閱圖書，還書7種方法的代碼塊

package TUshu;

import jdk.swing.interop.SwingInterOpUtils;

import java.util.ArrayList;
import java.util.Scanner;

public class MUlu {
    public static void main(String[] args) {
        ArrayList<book> Book = new ArrayList<>();
        while (true) {
            System.out.println("--------歡迎來到圖書管理系統-------");
            System.out.println("1.添加圖書");
            System.out.println("2.洗掉圖書");
            System.out.println("3.查看圖書");
            System.out.println("4.修改圖書");
            System.out.println("5.查看圖書借閱狀態");
            System.out.println("6.借閱圖書");
            System.out.println("7.還書：");
            System.out.println("8.退出");
            Scanner sc = new Scanner(System.in);
            int may = sc.nextInt();
            if(may == 1)
            {
                addbook(Book);
            }
            if(may == 2)
            {
                deletebook(Book);
            }
            if(may == 3)
            {
                ckbook(Book);
            }
            if(may ==4)
            {
                changebook(Book);
            }
            if(may == 5)
            {
                jkbook(Book);
            }
            if(may == 6)
            {
                jiebook(Book);
            }
            if(may == 7)
            {
                hbook(Book);
            }
            if(may == 8)
            {
                break;
            }
        }
    }
    public static void addbook(ArrayList<book> Book)
    {
        Scanner sc = new Scanner(System.in);
        book s = new book();
        String temp;
        System.out.println("請輸入書名");
        temp = sc.nextLine();
        s.setName(temp);
        System.out.println("請輸入作者");
        temp = sc.nextLine();
        s.setAuthor(temp);
        System.out.println("請輸入價格");
        temp = sc.nextLine();
        s.setPrice(temp);
        s.setStatus("在館");
        Book.add(s);
        System.out.println("資訊錄入成功");
    }
    public static void deletebook(ArrayList<book> Book)
    {
        Scanner sc = new Scanner(System.in);
        System.out.println("請輸入你要洗掉的書名");
        String b = sc.nextLine();
        int flag = 0;
        for(int i=0;i<Book.size();i++)
        {
            book t = Book.get(i);
            if(b.equals(t.getName())&&t.getStatus().equals("在館"))
            {
                flag =1;
                Book.remove(i);
            }
        }
        if(flag == 1)
        System.out.println("洗掉成功");
        else
            System.out.println("洗掉失敗，可能原因：1.書籍名稱對應錯誤，2.書籍已經被借閱");
    }
    public static void ckbook(ArrayList<book> Book)
    {
        int j = 0;
        for(int i=0;i<Book.size();i++)
        {
            j++;
            book t = Book.get(i);
            System.out.println("書名："+t.getName());
            System.out.println("作者："+t.getAuthor());
            System.out.println("價格："+t.getPrice());
        }
        if(j==0)
        {
            System.out.println("當前無書籍資訊，請錄入資訊后再進行查詢操作");
        }
    }
    public static void changebook(ArrayList<book>Book)
    {
        Scanner sc = new Scanner(System.in);
        System.out.println("請輸入你要更改資訊的書名");
        String t =sc.nextLine();
        int flag = 0;
        for(int i=0;i<Book.size();i++)
        {
            book s =Book.get(i);
            if(t.equals(Book.get(i).getName()))
            {
                System.out.println("-------請輸入你要修改的資訊------");
                System.out.println("1:書名");
                System.out.println("2:作者");
                System.out.println("3:價格");
                int tt = sc.nextInt();
                if(tt == 1)
                {
                    flag =1;
                    String name1 = sc.nextLine();
                    s.setName(name1);
                }
                if(tt ==2)
                {
                    flag =1;
                    String author1 = sc.nextLine();
                    s.setAuthor(author1);
                }
                if(tt == 3)
                {
                    flag =1;
                    String price1 = sc.nextLine();
                    s.setPrice(price1);
                }
            }
        }
        if(flag == 1)
        {
            System.out.println("更改成功");
        }else
        {
            System.out.println("更改失敗，可能為資訊輸入錯誤");
        }
    }
    public static void jkbook(ArrayList<book>Book)
    {
        System.out.println("請輸入你要查閱的書名：");
        Scanner sc = new Scanner(System.in);
        String t = sc.nextLine();
        int num=0;
        int num1=0;
        for(int i=0;i<Book.size();i++)
        {
            book tt = Book.get(i);
            if(t.equals(tt.getName()))
            {
                num++;
                if(tt.getStatus().equals("在館"))
                {
                    num1++;
                }
            }
        }
        System.out.println("你查閱的書籍共有"+num+"本，其中在館有"+num1+"本");
    }
    public static void jiebook(ArrayList<book>Book)
    {
        System.out.println("請輸入你要借閱的書：");
        Scanner sc = new Scanner(System.in);
        String t = sc.nextLine();
        int flag =0;
        for(int i=0;i<Book.size();i++)
        {
            book tt = Book.get(i);
            if(t.equals(tt.getName())&&tt.getStatus().equals("在館"))
            {
                flag = 1;
                tt.setStatus("已被借閱");
                break;
            }
        }
        if(flag == 1)
        {
            System.out.println("借閱成功，請在40天后歸還此書");
        }
    }
    public static void hbook(ArrayList<book>Book)
    {
        System.out.println("請輸入你要歸還的書籍名稱");
        Scanner sc = new Scanner(System.in);
        String t =sc.nextLine();
        int flag =0;
        for(int i=0;i<Book.size();i++)
        {
            book tt = Book.get(i);
            if(t.equals(tt.getName())&&tt.getStatus().equals("已被借閱"))
            {
                flag = 1;
                tt.setStatus("在館");
                break;
            }
        }
        if(flag == 1)
        {
            System.out.println("書籍歸還成功");
        }else if(flag == 0)
        {
            System.out.println("書籍歸還失敗，請檢查輸入名稱");
        }
    }
}

第二個檔案：書籍的管理資訊
package TUshu;

public class book {
    private  String name;
    private String author;
    private String price;
    private String status;
    public book(){}
    public book(String name,String author,String price,String status)
    {
        this.name = name;
        this.author = author;
        this.price = price;
        this.status = status;
    }
    public void setName(String name)
    {
        this.name = name;
    }
    public String getName()
    {
        return this.name;
    }
    public void setAuthor(String author)
    {
        this.author = author;
    }
    public String getAuthor()
    {
        return this.author;
    }
    public void setPrice(String price)
    {
        this.price = price;
    }
    public String getPrice()
    {
        return this.price;
    }
    public void setStatus(String status)
    {
        this.status = status;
    }
    public String getStatus()
    {
        return this.status;
    }
}

**

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