interface ShowMessage{
    void 显示商标(String s);
}
class TV implements ShowMessage{
    public void 显示商标(String s){
        System.out.println(s);
    }
}
class PC implements ShowMessage {
    public void 显示商标(String s){
        System.out.println(s);
    }
}
public class E62{
    public static void main(String args[]){
        ShowMessage sm;
        sm = new TV();
        sm.显示商标("长城牌电视机");
        sm = new PC();
        sm.显示商标("联想奔月5008PC机");
    }
}