创建一个Library的类的实例,myLittleLibrary,其中预存有以下三本书: Java程序设计,张三著,45元 Java核心设计,李四著,50元 Java程序设计,王五著,38元
时间: 2024-05-19 10:14:34 浏览: 13
class Library:
def __init__(self, books):
self.books = books
def display_books(self):
for book in self.books:
print(book)
class Book:
def __init__(self, title, author, price):
self.title = title
self.author = author
self.price = price
def __str__(self):
return '{} by {} - {}元'.format(self.title, self.author, self.price)
book1 = Book('Java程序设计', '张三', 45)
book2 = Book('Java核心设计', '李四', 50)
book3 = Book('Java程序设计', '王五', 38)
books = [book1, book2, book3]
myLittleLibrary = Library(books)
myLittleLibrary.display_books()
相关问题
(1) 创建一个Library的类的实例,myLittleLibrary,其中预存有以下三本书: Java程序设计,张三著,45元 Java核心设计,李四著,50元 Java程序设计,王五著,38元
class Book:
def __init__(self, title, author, price):
self.title = title
self.author = author
self.price = price
class Library:
def __init__(self, books):
self.books = books
def display_books(self):
for book in self.books:
print(f"{book.title}, {book.author}著,{book.price}元")
books = [
Book("Java程序设计", "张三", 45),
Book("Java核心设计", "李四", 50),
Book("Java程序设计", "王五", 38)
]
myLittleLibrary = Library(books)
myLittleLibrary.display_books()
java创建一个张三,18岁的Student类
可以通过以下代码创建一个名为张三,18岁的Student对象:
```java
public class Student {
private String name;
private int age;
public Student(String name, int age) {
this.name = name;
this.age = age;
}
// getters and setters
public static void main(String[] args) {
Student zhangsan = new Student("张三", 18);
System.out.println(zhangsan.getName() + "," + zhangsan.getAge() + "岁");
}
}
```
在这个例子中,我们定义了一个名为Student的类,其中包含了学生的姓名和年龄属性,以及相应的getter和setter方法。在main方法中,我们创建了一个名为zhangsan的Student对象,并输出其姓名和年龄。
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