答案：```java
// 抽象类Person
abstract class Person {
private String name;
private String sex;
private int age;
public Person(String name, String sex, int age) {
this.name = name;
this.sex = sex;
this.age = age;
}
public abstract void eat();
public String getName() {
return name;
}
public String getSex() {
return sex;
}
public int getAge() {
return age;
}
}
// Chinese类
class Chinese extends Person {
public Chinese(String name, String sex, int age) {
super(name, sex, age);
}
@Override
public void eat() {
System.out.println(getName() + " is eating with chopsticks.");
}
public void shadowBoxing() {
System.out.println(getName() + " is practicing shadow boxing.");
}
}
// English类
class English extends Person {
public English(String name, String sex, int age) {
super(name, sex, age);
}
@Override
public void eat() {
System.out.println(getName() + " is eating with a knife and fork.");
}
public void horseRiding() {
System.out.println(getName() + " is horse riding.");
}
}
// 测试类
public class Test {
public static void main(String[] args) {
Person chinese = new Chinese("Li Hua", "Male", 25);
Person english = new English("John Doe", "Male", 30);
showEat(chinese);
showEat(english);
((Chinese) chinese).shadowBoxing();
((English) english).horseRiding();
}
public static void showEat(Person person) {
person.eat();
}
}
```
