public class ExtendDemo {
public static void main(String[] args) {
Chicken chicken1 = new Chicken("小克", "紅色小雞冠");
Chicken chicken2 = new Chicken();
System.out.printf("小雞1 - 名稱 %s, 雞冠是 %s。 \n",
chicken1.getName(), chicken1.getCrest());
chicken1.wu();
System.out.printf("小雞2 - 名稱 %s, 雞冠是 %s。 \n",
chicken2.getName(), chicken2.getCrest());
chicken2.wu();
}
}