Java 类和对象示例：创建 Book 类并输出书籍信息

public class Book {
    private String name;
    private String author;
    private double price;

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

    public void printBookInfo() {
        System.out.println('Book name: ' + name);
        System.out.println('Book author: ' + author);
        System.out.println('Book price: ' + price);
    }
}

public class TestBook {
    public static void main(String[] args) {
        Book b1 = new Book('The Alchemist', 'Paulo Coelho', 15.99);
        b1.printBookInfo();
    }
}

输出结果：

Book name: The Alchemist
Book author: Paulo Coelho
Book price: 15.99