继承-people

创建如下三个类：（People类中的三个方法分别输出一些信息，ChinaPeople

和AmericanPeople类重写父类的三个方法）。

package com.hanqi.z1p1;

public class People {

    protected double height;
    protected double weight;
    
    public void speakHello()
    {
        System.out.println("Hello!");
    }
    public void averageHeight()
    {
        System.out.println("平均身高");
    }
    public void averageWeight()
    {
        System.out.println("平均体重");
    }
    
}

package com.hanqi.z1p1;

public class ChinaPeople extends People {

    public void chinaGongfu()
    {
        System.out.println("坐如钟，站如松，睡如弓");
    }
    
    public void speakHello()
    {
        System.out.println("你好");
    }
    public void averageHeight()
    {
        System.out.println("中国平均身高为170");
    }
    public void averageWeight()
    {
        System.out.println("中国平均体重为140");
    }
}

package com.hanqi.z1p1;

public class AmericanPeople extends People{

    public void americanBoxing()
    {
        System.out.println("直拳，勾拳");
    }
    
    public void speakHello()
    {
        System.out.println("Hi");
    }
    public void averageHeight()
    {
        System.out.println("美国平均身高为170");
    }
    public void averageWeight()
    {
        System.out.println("美国平均体重为140");
    }
    
    
    
}

package com.hanqi.z1p1;

public class TestPeople0522 {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根

        People p=new People();
        p.speakHello();
        p.averageHeight();
        p.averageWeight();
        
        
        ChinaPeople cp=new ChinaPeople();
        cp.speakHello();
        cp.averageHeight();
        cp.averageWeight();
        
        AmericanPeople ap=new AmericanPeople();
        ap.speakHello();
        ap.averageHeight();
        ap.averageWeight();
        
        
        
        
        
        
    }

}

运行结果：