Java面向?qū)ο缶幊蹋ǚ庋b/繼承/多態(tài)）實例解析

更新時間：2017年10月27日 09:52:22 作者：書思BookReflect

這篇文章主要介紹了Java面向?qū)ο缶幊蹋ǚ庋b/繼承/多態(tài)）實例解析的相關(guān)內(nèi)容，具有一定參考價值，需要的朋友可以了解下。

本文主要介紹了面向?qū)ο蟮娜筇卣鲗嵗馕觯旅婵纯淳唧w內(nèi)容。

封裝

封裝一個Teacher和Student類

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() + ", 專業(yè)方向=" + getMajorDirection()
        + ", 所教課程=" + getTeachCourse() + ", 教齡=" + getTeachAge();
  }
}

Student類

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("年齡不能為負值");
    }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() + ", 年齡=" + getAge() + ", 課程=" + getCourses()
        + ", 興趣=" + getInterest();
  }  
}

測試類

package com.hz.test;
public class Test {
  public static void main(String[] args) {
    String arr[] = {"阿斯達","是的","大概","太誘惑"};
    Student stu = new Student("張三",21,arr,"打球");
    Teacher tea = new Teacher("王五","阿斯達","阿斯達",99);
    System.out.println(stu);
    System.out.println(tea);
  }
}

輸出結(jié)果：

姓名=張三, 年齡=21, 課程=[阿斯達, 是的, 大概, 太誘惑], 興趣=打球
姓名=王五, 專業(yè)方向=阿斯達, 所教課程=阿斯達, 教齡=99

繼承

定義Play，TaoistPriest，Master，Warrior

public class Play {
  String main;
  public Play(String main) {
    this.main = main;
  }
  public void hitMonster() {
    System.out.println(main+"打怪");
  }
}

/**
 * TaoistPriest:道士
 * @author ztw
 *
 */
public class TaoistPriest extends Play {
  {
    System.out.print("我是道士：");
  }
  public TaoistPriest(String main) {
    super(main);
  }
}

/**
 * Master:法師
 * @author ztw
 *
 */
public class Master extends Play{
  {
    System.out.print("我是法師：");
  }
  public Master(String main) {
    super(main);
  }
}

/**
 * Warrior:武士
 * @author ztw
 *
 */
public class Warrior extends Play{
  {
    System.out.print("我是武士：");
  }
  public Warrior(String main) {
    super(main);
  }
}

測試類

public class Test {
  public static void main(String[] args) {
    TaoistPriest tp = new TaoistPriest("靈魂火符");
    tp.hitMonster();
    Master m = new Master("雷電術(shù)");
    m.hitMonster();
    Warrior w = new Warrior("烈火術(shù)");
    w.hitMonster();
  }
}

輸出結(jié)果：

我是道士：靈魂火符打怪 
我是法師：雷電術(shù)打怪 
我是武士：烈火術(shù)打怪

多態(tài)

服務(wù)器，客戶端交互

LoginListener

public interface LoginListener {
  public void succeed(String msg);
  public void failed(String msg);
}

MyLoginListener

public class MyLoginListener implements LoginListener{
  public void succeed(String msg) {
    System.out.println(msg);
  }
  public void failed(String msg) {
    System.out.println(msg);
  }
}

Server

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("登錄成功");
      }
    }else{
      if(listener!=null){
        listener.succeed("登錄失敗");
      }
    }
  }
}

測試類

public class LoginTest {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.println("請輸入用戶名：");
    String userName = sc.next();
    System.out.println("請輸入用戶密碼：");
    String password = sc.next();
    Server server = new Server();
    server.login(userName, password, new MyLoginListener());
  }
}

輸出結(jié)果

請輸入用戶名： 
zhangsan 
請輸入用戶密碼： 
123 
loading……….登錄成功

總結(jié)

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