JAVA大学实用教程实验指导5.2.1答案

P39       继承             代码补完

 

 

 

Example.java

1. class People
2. {
3.     protected double weight,height;
4.     public void speakHello()
5.     {
6.         System.out.println("yayawawa");
7.     }
8.     public void averageHeight()
9.     {
10.         height=173;
11.         System.out.println("average height:"+height);
12.     }
13.     public void averageWeight()
14.     {
15.         weight=70;
16.         System.out.println("average weight:"+weight);
17.     }
18. }
19. class ChinaPeople extends People
20. {
21.     public void speakHello()
22.     {
23.         System.out.println("你好,吃了吗?");
24.     }
25.     public void averageHeight()
26.     {
27.         System.out.println("中国人的平均身高:168.78厘米");
28.     }
29.     public void averageWeight()
30.     {
31.         System.out.println("中国人的平均体重:65公斤");
32.     }
33.     public void chinaGongfu()
34.     {
35.         System.out.println("坐如钟,站如松,睡如弓");
36.     }
37. }
38. class AmericanPeople extends People
39. {
40.     public void speakHello()
41.     {
42.         System.out.println("How do you do?");
43.     }
44.     public void averageHeight()
45.     {
46.         System.out.println("Amerian Average height:188.0 cm");
47.     }
48.     public void averageWeight()
49.     {
50.         System.out.println("Amerian Average weight:82.23 kg");
51.     }
52.     public void americanBoxing()
53.     {
54.         System.out.println("直拳,钩拳");
55.     }
56. }
57. class BeijingPeople extends ChinaPeople
58. {
59.     public void speakHello()
60.     {
61.         System.out.println("您好");
62.     }
63.     public void averageHeight()
64.     {
65.         System.out.println("北京人的平均身高:166.0厘米");
66.     }
67.     public void averageWeight()
68.     {
69.         System.out.println("北京人的平均体重:67.4公斤");
70.     }
71.     public void beijingOpera()
72.     {
73.         System.out.println("京剧术语");
74.     }
75. }
76. public class Example
77. {
78.     public static void main(String args[])
79.     {
80.         ChinaPeople chinaPeople=new ChinaPeople();
81.         AmericanPeople americanPeople=new AmericanPeople();
82.         BeijingPeople beijingPeople=new BeijingPeople();
83.         chinaPeople.speakHello();
84.         americanPeople.speakHello();
85.         beijingPeople.speakHello();
86.         chinaPeople.averageHeight();
87.         americanPeople.averageHeight();
88.         beijingPeople.averageHeight();
89.         chinaPeople.averageWeight();
90.         americanPeople.averageWeight();
91.         beijingPeople.averageWeight();
92.         chinaPeople.chinaGongfu();
93.         americanPeople.americanBoxing();
94.         beijingPeople.beijingOpera();
95.         beijingPeople.chinaGongfu();
96.     }
97. }