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=;
C.weight=;
C.speakHello();
C.averageHeight();
C.averageWeight();
C.chinaGongfu(); AmericanPeople M =new AmericanPeople();
M.height=;
M.weight=;
M.speakHello();
M.averageHeight();
M.averageWeight();
M.amercianBoxing(); }}