java :创建图书类:Book2属性name书名 price价格,author作者,counry？

可以使用以下代码创建一个具有name、price、author和country属性的Java图书类Book2：

public class Book2 {
    private String name;
    private double price;
    private String author;
    private String country;

    public Book2(String name, double price, String author, String country) {
        this.name = name;
        this.price = price;
        this.author = author;
        this.country = country;
    }

    // Getters and setters for each attribute
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }
}

这个类中有一个构造函数，它可以用来初始化对象的属性。还有一些getter和setter方法，用于访问和修改属性值。

更详细的回复

要创建一个Java图书类Book2，可以使用以下代码实现：

public class Book2 {
    private String name;
    private double price;
    private String author;
    private String country;

    public Book2(String name, double price, String author, String country) {
        this.name = name;
        this.price = price;
        this.author = author;
        this.country = country;
    }

    // getter and setter methods for all the attributes

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }
}

这里我们定义了四个属性：name表示书名，price表示价格，author表示作者，country表示国家。我们在构造方法中初始化对象的属性值，并提供了每个属性的getter和setter方法来访问和修改这些属性。

例如，我们可以使用以下代码创建一个Book2对象并设置其属性值：

Book2 book = new Book2("The Great Gatsby", 10.99, "F. Scott Fitzgerald", "USA");
book.setPrice(9.99);
System.out.println(book.getName()); // Output: The Great Gatsby
System.out.println(book.getAuthor()); // Output: F. Scott Fitzgerald
System.out.println(book.getPrice()); // Output: 9.99
System.out.println(book.getCountry()); // Output: USA

这里我们创建了一个名为book的Book2对象，并设置了其属性值。接着，我们使用setter方法将其价格修改为9.99，并使用getter方法分别获取了书名、作者、价格和国家属性的值，并打印输出。