帮我分析下列java代码:abstract class GirlFriend { abstract void speak (); abstract void cooking (); } Class ChinaGirlFriend extends GirlFriend { void speak (){ System . out . println ("你好"); } void cobking (){ System . out . println ("水煮鱼"); } } class AmericanGirlFriend extends GirlFriend { void speak (){ System . out . println (" hello "); } void cooking (){ System . out . println (" roast beff”); } } class Boy { GirlFriend friend ; void setGirlfriend ( GirlFriend f ){ friend = f ; } void showGirlFriend (){ friend . speak (); friend . cooking (); } } public class Example5_12{ public static void main ( String args []){ GirlFriend girl = newChinaGirlFriend (); Boy boy = new Boy (); boy . setGirlfriend ( girl ); boy . showGirlFriend (); girl = new AmericanGirlFriend (); boy . setGirlfriend ( girl ); boy . showGirlFriend (); } }
时间: 2024-04-22 20:28:59 浏览: 9
这段代码定义了一个抽象类GirlFriend,包含了两个抽象方法speak()和cooking()。然后又定义了两个类ChinaGirlFriend和AmericanGirlFriend,分别继承了GirlFriend类,并实现了speak()和cooking()方法。接着定义了一个Boy类,包含了一个GirlFriend类型的属性friend,以及setGirlfriend()和showGirlFriend()方法。最后在主函数中创建了一个ChinaGirlFriend对象girl,并将其作为参数传递给Boy对象的setGirlfriend()方法,然后调用showGirlFriend()方法输出girl的speak()和cooking()方法。接着又创建了一个AmericanGirlFriend对象girl,并将其作为参数传递给Boy对象的setGirlfriend()方法,再次调用showGirlFriend()方法输出girl的speak()和cooking()方法。整个程序演示了面向对象中的继承和多态的概念。
相关问题
用python随机定义一个girlfriend类
以下是一个随机定义的Girlfriend类的代码示例:
```python
import random
class Girlfriend:
def __init__(self):
self.name = self.generate_name()
self.age = self.generate_age()
self.hobby = self.generate_hobby()
def generate_name(self):
names = ["Alice", "Bella", "Cindy", "Daisy", "Emily", "Fiona"]
return random.choice(names)
def generate_age(self):
return random.randint(18, 30)
def generate_hobby(self):
hobbies = ["reading", "traveling", "cooking", "dancing", "painting"]
return random.choice(hobbies)
def introduce(self):
print(f"Hi, my name is {self.name}. I'm {self.age} years old, and I love {self.hobby}.")
# 测试
girlfriend = Girlfriend()
girlfriend.introduce()
```
输出结果可能为:
```
Hi, my name is Cindy. I'm 21 years old, and I love cooking.
```
class People: def init(self, name, age): self.name = name self.age = age class Boyfriend(People): def init(self, name, age): super().init(name, age) class Girlfriend(People): def init(self, name, age): super().init(name, age)
这是一个关于 Python 类的问题,我可以回答。这段代码定义了一个 People 类,它有一个构造函数 init,接受两个参数 name 和 age,并将它们分别赋值给类的属性 self.name 和 self.age。此外,还定义了两个子类 Boyfriend 和 Girlfriend,它们都继承了 People 类,并重写了 init 方法,调用了父类的 init 方法。