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）。

ackage com.chuoji.text01;

public class People {
    
    protected double height;
    protected double 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("你好");
    }
    public void averageHeight(){
        System.out.println("身高是："+height);
    }
    public void averageWeight(){
        System.out.println("体重是："+weight);
    }
}

package com.chuoji.text01;

public class ChinaPeople extends People {

    public void speakHello(){
        System.out.println("你好，我是中国人！");
    }
    public void averageHeight(){
        System.out.println("中国人身高是："+height);
    }
    public void averageWeight(){
        System.out.println("中国人体重是："+weight);
    }
    public void chinaGongfu(){
        System.out.println("我会功夫：坐如钟，站如松，卧如弓！");
    }
    
}

package com.chuoji.text01;

public class AmericanPeople extends People{

     public void speakHello(){
            System.out.println("你好，我是美国人！");
        }
        public void averageHeight(){
            System.out.println("美国人身高是："+height);
        }
        public void averageWeight(){
            System.out.println("美国人体重是："+weight);
        }
        public void amercianBoxing(){
            System.out.println("我会拳击：直拳、上勾拳");
        }
    
    
}

package com.chuoji.text01;

public class Text {

    public static void main(String[] args) {

        ChinaPeople C=new ChinaPeople();
        C.height=175;
        C.weight=65;
        C.speakHello();
        C.averageHeight();
        C.averageWeight();
        C.chinaGongfu();
        
        AmericanPeople M =new AmericanPeople();
        M.height=180;
        M.weight=75;
        M.speakHello();
        M.averageHeight();
        M.averageWeight();
        M.amercianBoxing();
        

    }

}