本文主要介绍了面向对象的三大特征实例解析，下面看看具体内容。
封装一个Teacher和Student类
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
package com.hz.test;public class Teacher { private String name; private String majorDirection; private String teachCourse; private int teachAge; public Teacher() { super(); } public Teacher(String name,String majorDirection,String teachCourse,int teachAge) { this.name = name; this.majorDirection = majorDirection; this.teachCourse = teachCourse; this.teachAge = teachAge; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getMajorDirection() { return majorDirection; } public void setMajorDirection(String majorDirection) { this.majorDirection = majorDirection; } public String getTeachCourse() { return teachCourse; } public void setTeachCourse(String teachCourse) { this.teachCourse = teachCourse; } public int getTeachAge() { return teachAge; } public void setTeachAge(int teachAge) { this.teachAge = teachAge; } public String toString() { return "姓名=" + getName() + ", 专业方向=" + getMajorDirection() + ", 所教课程=" + getTeachCourse() + ", 教龄=" + getTeachAge(); }} |
Student类
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
package com.hz.test;import java.util.Arrays;/** * @author ztw * */public class Student { private String name; private int age; private String[] courses; private String interest; public Student() { super(); } public Student(String name,int age,String[] courses,String interest) { this.name = name; this.age = age; this.courses = courses; this.interest = interest; } public void setName(String name){ this.name = name; } public String getName(){ return name; } public void setAge(int age){ if(age<0){ System.out.println("年龄不能为负值"); }else{ this.age = age; } } public int getAge(){ return age; } public void setCourses(String[] courses){ this.courses = courses; } public String getCourses(){ return Arrays.toString(courses); } public void setInterest(String interest){ this.interest = interest; } public String getInterest(){ return interest; } public String toString() { return "姓名=" + getName() + ", 年龄=" + getAge() + ", 课程=" + getCourses() + ", 兴趣=" + getInterest(); } } |
测试类
|
1
2
3
4
5
6
7
8
9
10
|
package com.hz.test;public class Test { public static void main(String[] args) { String arr[] = {"阿斯达","是的","大概","太诱惑"}; Student stu = new Student("张三",21,arr,"打球"); Teacher tea = new Teacher("王五","阿斯达","阿斯达",99); System.out.println(stu); System.out.println(tea); }} |
输出结果：
姓名=张三, 年龄=21, 课程=[阿斯达, 是的, 大概, 太诱惑], 兴趣=打球
姓名=王五, 专业方向=阿斯达, 所教课程=阿斯达, 教龄=99
定义Play，TaoistPriest，Master，Warrior
|
1
2
3
4
5
6
7
8
9
|
public class Play { String main; public Play(String main) { this.main = main; } public void hitMonster() { System.out.println(main+"打怪"); }} |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
/** * TaoistPriest:道士 * @author ztw * */public class TaoistPriest extends Play { { System.out.print("我是道士："); } public TaoistPriest(String main) { super(main); }} |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
/** * Master:法师 * @author ztw * */public class Master extends Play{ { System.out.print("我是法师："); } public Master(String main) { super(main); }} |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
/** * Warrior:武士 * @author ztw * */public class Warrior extends Play{ { System.out.print("我是武士："); } public Warrior(String main) { super(main); }} |
测试类
|
1
2
3
4
5
6
7
8
9
10
|
public class Test { public static void main(String[] args) { TaoistPriest tp = new TaoistPriest("灵魂火符"); tp.hitMonster(); Master m = new Master("雷电术"); m.hitMonster(); Warrior w = new Warrior("烈火术"); w.hitMonster(); }} |
输出结果：
|
1
2
3
|
我是道士：灵魂火符打怪 我是法师：雷电术打怪 我是武士：烈火术打怪 |
服务器，客户端交互
LoginListener
|
1
2
3
4
|
public interface LoginListener { public void succeed(String msg); public void failed(String msg);} |
MyLoginListener
|
1
2
3
4
5
6
7
8
|
public class MyLoginListener implements LoginListener{ public void succeed(String msg) { System.out.println(msg); } public void failed(String msg) { System.out.println(msg); }} |
Server
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
public class Server { public void login(String userName,String password,LoginListener listener) { System.out.print("loading"); for (int i = 0; i < 10; i++) { try { Thread.sleep(100*i); System.out.print("."); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(userName.equals("zhangsan") && password.equals("123")){ if(listener!=null){ listener.succeed("登录成功"); } }else{ if(listener!=null){ listener.succeed("登录失败"); } } }} |
测试类
|
1
2
3
4
5
6
7
8
9
10
11
|
public class LoginTest { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("请输入用户名："); String userName = sc.next(); System.out.println("请输入用户密码："); String password = sc.next(); Server server = new Server(); server.login(userName, password, new MyLoginListener()); }} |
输出结果
|
1
2
3
4
5
|
请输入用户名： zhangsan 请输入用户密码： 123loading……….登录成功 |
总结
以上就是本文关于Java面向对象编程（封装，继承，多态）实例解析的全部内容，希望对大家有所帮助。如有不足之处，欢迎留言指出。感谢朋友们对本站的支持！
原文链接：http://blog.csdn.net/qq_33624284/article/details/53606306
