创建一个Java图书类

创建一个Java图书类

Java程序：

class BookTest {
public static void main(String args[]) {
   Book book = new Book("Java", "张三", 30, 2000);
   System.out.println("图书总价：" + book.totalPrice());
}
}


class Book {

private String name;


private String author;


private double price;


private int amount;


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


public String getName() {
return this.name;
}


public String getAuthor() {
return this.author;
}


public double getPrice() {
return this.price;
}


public int getAmount() {
return this.amount;
}


public double totalPrice() {
return this.price * this.amount;
}
}

运行测试：
图书总价：60000.0

public class TestBook {
public static void main(String [] agrs){
Book book = new Book("Java","张三",30,2000);
System.out.println(book.totalPrice());
}
}
class Book{
private String name;
    private String author;
private double price;
private int amount;
//构造器
public Book(String name,String author,double price,int amount){
this.name = name;
this.author = author;
this.price = price;
this.amount = amount;
}
public void setPrice(double price){
this.price = price;
}
public void setPrice(int amount){
this.amount = amount;
}
public double totalPrice(){
return this.price * this.amount;
}
}

运行结果：