三个类，People类中的三个方法分别输出一些信息， ChinesePeople和AmericanPeople类重写父类的三个方法。 public class Peple {protected double height;protected double weight;public void speakHello(){System.out.print
public class Peple {
protected double height;
protected double weight;
public void speakHello(){
System.out.println("Hello");
}
public void showAverageHeight(){
System.out.println("AverageHeight");
}
public void showAverageWeight(){
System.out.println("AverageWeight");
}
}
public class ChinesePeople extends Peple{
public void chineseKungfu(){
System.out.println("坐如钟，站如松");
}
public void speakHello(){
System.out.println("Hello!");
}
public void showAverageHeight(){
System.out.println("180");
}
public void showAverageWeight(){
System.out.println("130");
}
}
public class AmericanPeople extends Peple{
public void americanBoxing(){
System.out.println("直拳、勾拳");
}
public void speakHello(){
System.out.println("Hello!Hello!Hello!");
}
public void showAverageHeight(){
System.out.println("185");
}
public void showAverageWeight(){
System.out.println("140");
}
}