class Person{    
    public static void print(String s){
        System.out.println(s); 
    }
    Person(){
        print("A Person.");
    }
    Person(String name){
        print("A person name is:"+name);
    }
}
public class Chinese extends Person{
    Chinese(){
        super();//ø๹캯1
        print("A chinese.");//4
    }
    Chinese(String name){
        super(name);//øͬβεĹ캯2
        print("his name is:"+name); 
    }
    Chinese(String name,int age){
        this(name);//õǰͬβεĹ캯3
        print("his age is:"+age);
    }
    public static void main(String[] args){
        Chinese people=new Chinese();
        people=new Chinese("");
        people=new Chinese("",20);
    }
}
