java上机第八周任务1 继承的练习

亦凉 2022-05-21 02:16 169阅读 0赞

/* 
    * 程序头部注释开始   
    * 程序的版权和版本声明部分   
    * Copyright (c) 2011, 烟台大学计算机学院学生   
    * All rights reserved.   
    * 文件名称：继承的练习                           
    * 作    者：薛广晨                               
    * 完成日期：2012  年 10 月  17  日   
    * 版 本号：x1.0            
       
    * 对任务及求解方法的描述部分   
    * 输入描述：  
    * 问题描述: （1）封装一个People类型，具有height和weight属性，具有speakHello、averageHeight、averageWeight功能。
    
    	   （2）封装一类ChinaPeople类型是People的子类，新增chinaMartial功能，override超类的speakHello、averageHeight、averageWeight功能。
    
    （3）封装一类AmericanPeople类型是People的子类，新增AmericanBoxing功能，override超类的speakHello、averageHeight、averageWeight功能。
    
    （4）封装一类BeijingPeople类型是ChinaPeople的子类，新增BeijingOpera功能，override超类的speakHello、averageHeight、averageWeight功能。
    
    （5）用一个程序执行入口Test测试上述对象
    * 程序输出：   
    * 程序头部的注释结束 
    */
    //People类
    
    package xgc;
    
    public class People {
    	private double height;
    	private double weight;
    	
    	public People()
    	{
    		this.height = 10;
    		this.weight = 10;
    	}
    	
    	public People(double height, double weight)
    	{
    		this.height = height;
    		this.weight = weight;
    	}
    	
    	public double getHeight() {
    		return height;
    	}
    	public void setHeight(double height) {
    		this.height = height;
    	}
    	public double getWeight() {
    		return weight;
    	}
    	public void setWeight(double weight) {
    		this.weight = weight;
    	}
    	
    	public void speakHello()
    	{
    		System.out.println("Hello");
    	}
    	
    	public void averageHeight()
    	{
    	}
    	
    	public void averageWeight()
    	{
    	}
    }
    
    //ChinaPeople
    package xgc;
    
    public class ChinaPeople extends People {
    	
    	public void chinaMartial()
    	{
    		System.out.println("ChinaPeople 太极 very good");
    	}
    	
    	public void speakHello()
    	{
    		System.out.println("ChinaPeople 说 你好");
    	}
    	
    	public void averageHeight()
    	{
    		setHeight(1.7);  
    		System.out.println("ChinaPeople averageHeight = "+ getHeight());
    	}
    	
    	public void averageWeight()
    	{
    		setWeight(70);  
    		System.out.println("ChinaPeople averageWeight = "+ getWeight());
    	}
    
    }
    
    //AmericanPeople
    package xgc;
    
    public class AmericanPeople extends People{
    	public void AmericanBoxing(){
    		System.out.println("AmericanPeople Boxing very good");
    	}
    
    	public void speakHello()
    	{
    		System.out.println("AmericanPeople say Hello");
    	}
    	
    	public void averageHeight()
    	{
    		setHeight(1.8);  
    		System.out.println("AmericanPeople averageHeight = "+ getHeight()); 
    	}
    	
    	public void averageWeight()
    	{
    		setWeight(75);  
    		System.out.println("AmericanPeople averageWeight = "+ getWeight()); 
    	}
    }
    
    //BeijingPeople
    package xgc;
    
    public class BeijingPeople extends ChinaPeople{
    	public void BeijingOpera(){
    		System.out.println("BeijingOpera very good");
    	}
    	
    	public void speakHello()
    	{
    		System.out.println("BeijingPeople 说 你好");
    	}
    	
    	public void averageHeight()
    	{
    		setHeight(1.75);  
    		System.out.println("ChinaPeople averageHeight = "+ getHeight());
    	}
    	
    	public void averageWeight()
    	{
    		setWeight(73);  
    		System.out.println("AmericanPeople averageWeight = "+ getWeight());
    	}
    
    }
    
    //测试类Test
    package xgc;
    
    public class Test {
    
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		ChinaPeople cp = new ChinaPeople();
    		cp.speakHello();
    		cp.chinaMartial();
    		cp.averageHeight();
    		cp.averageWeight();
    		System.out.println();
    		
    		AmericanPeople ap = new AmericanPeople();
    		ap.speakHello();
    		ap.AmericanBoxing();
    		ap.averageHeight();
    		ap.averageWeight();
    		System.out.println();
    		
    		BeijingPeople bp = new BeijingPeople();
    		bp.speakHello();
    		bp.BeijingOpera();
    		bp.averageHeight();
    		bp.averageWeight();
    		System.out.println();
    
    	}
    
    }

运行结果：

![1350489952_6039.jpg][]

[1350489952_6039.jpg]: https://img-my.csdn.net/uploads/201210/18/1350489952_6039.jpg