java集合编写读者类实现增删改查和充值的代码

以下是一个简单的实现读者类的代码，包含增删改查和充值功能。其中，使用了Java集合类ArrayList来存储读者信息。

import java.util.ArrayList;

public class Reader {
    private String name;
    private String id;
    private double balance;
    private ArrayList<Book> borrowedBooks; // 存储已借阅的图书

    public Reader(String name, String id) {
        this.name = name;
        this.id = id;
        this.balance = 0;
        this.borrowedBooks = new ArrayList<>();
    }

    // 借书
    public void borrow(Book book) {
        borrowedBooks.add(book);
    }

    // 还书
    public void returnBook(Book book) {
        borrowedBooks.remove(book);
    }

    // 充值
    public void recharge(double amount) {
        this.balance += amount;
    }

    // 获取当前余额
    public double getBalance() {
        return balance;
    }

    // 修改读者信息
    public void updateInfo(String name, String id) {
        this.name = name;
        this.id = id;
    }

    // 根据书名查询已借阅的图书
    public ArrayList<Book> searchBorrowedBooks(String bookName) {
        ArrayList<Book> result = new ArrayList<>();
        for (Book book : borrowedBooks) {
            if (book.getTitle().equals(bookName)) {
                result.add(book);
            }
        }
        return result;
    }

    // 根据ID查询已借阅的图书
    public Book searchBorrowedBookById(String bookId) {
        for (Book book : borrowedBooks) {
            if (book.getId().equals(bookId)) {
                return book;
            }
        }
        return null;
    }
}

其中，Book类表示图书类，具体实现可参考以下代码：

public class Book {
    private String id;
    private String title;
    private String author;
    private double price;

    public Book(String id, String title, String author, double price) {
        this.id = id;
        this.title = title;
        this.author = author;
        this.price = price;
    }

    public String getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public double getPrice() {
        return price;
    }
}

以上代码仅为示例，实际应用中可能需要根据具体需求进行修改和完善。