关于#java#的问题：新建两个类：Book和MainClass。Book中有属性作者(author)、出版社 (publisher)和价格(price)。MainCLass中定义两个书B1和B2

新建两个类：Book和MainClass。Book中有属性作者(author)、出版社
(publisher)和价格(price)。有设置价格的方法setPricO，有获取价格的方法getPricO，有销售的方法show0，当价格超过100元，打9折销售，当价格没有超过100元，原价销售。|
MainCLass中定义两个书B1和B2，B1的价格是119元，B2的价格是76元，(作者和出版社自定)输出两本书的销售信息

public class Book {
    private String author;
    private String publisher;
    private int price;

    public Book(String author, String publisher, int price) {
        this.author = author;
        this.publisher = publisher;
        this.price = price;
    }

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

    public int getPrice() {
        return price;
    }
    public String show(){
        return "作者："+author+",出版社："+publisher+",价格："+(price>100?(int)(price*0.9):price);
    }
}

public class MainClass {
    public static void main(String[] args) {
        Book B1=new Book("小白","清华出版社",119);
        Book B2=new Book("小黑","江西出版社",76);
        System.out.println(B1.show());
        System.out.println(B2.show());
    }
}