编写一个简单的java图书管理系统

好的，下面是一个简单的Java图书管理系统的代码示例：

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

public class BookManagementSystem {
    private static ArrayList<Book> books = new ArrayList<Book>();
    private static Scanner scanner = new Scanner(System.in);
    
    public static void main(String[] args) {
        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加书籍");
            System.out.println("2. 删除书籍");
            System.out.println("3. 查找书籍");
            System.out.println("4. 显示所有书籍");
            System.out.println("0. 退出系统");
            
            int choice = scanner.nextInt();
            switch (choice) {
            case 1:
                addBook();
                break;
            case 2:
                deleteBook();
                break;
            case 3:
                findBook();
                break;
            case 4:
                displayBooks();
                break;
            case 0:
                System.out.println("谢谢使用，再见！");
                System.exit(0);
            default:
                System.out.println("输入错误，请重新选择！");
                break;
            }
        }
    }
    
    private static void addBook() {
        System.out.println("请输入书籍名称：");
        String name = scanner.next();
        System.out.println("请输入书籍作者：");
        String author = scanner.next();
        Book book = new Book(name, author);
        books.add(book);
        System.out.println("添加成功！");
    }
    
    private static void deleteBook() {
        System.out.println("请输入要删除的书籍名称：");
        String name = scanner.next();
        boolean flag = false;
        for (Book book : books) {
            if (book.getName().equals(name)) {
                books.remove(book);
                flag = true;
                System.out.println("删除成功！");
                break;
            }
        }
        if (!flag) {
            System.out.println("未找到该书籍！");
        }
    }
    
    private static void findBook() {
        System.out.println("请输入要查找的书籍名称：");
        String name = scanner.next();
        boolean flag = false;
        for (Book book : books) {
            if (book.getName().equals(name)) {
                System.out.println(book);
                flag = true;
                break;
            }
        }
        if (!flag) {
            System.out.println("未找到该书籍！");
        }
    }
    
    private static void displayBooks() {
        if (books.size() == 0) {
            System.out.println("暂无书籍！");
        } else {
            for (Book book : books) {
                System.out.println(book);
            }
        }
    }
}

class Book {
    private String name;
    private String author;
    
    public Book(String name, String author) {
        this.name = name;
        this.author = author;
    }
    
    public String getName() {
        return name;
    }
    
    public String getAuthor() {
        return author;
    }
    
    public String toString() {
        return "书名：" + name + "，作者：" + author;
    }
}

这个图书管理系统包含了添加、删除、查找和显示所有书籍等操作，可以根据实际需求进行修改和优化。