java如何同时调用接口和超类啊
package seventh;
interface animals{
void level_up();
}
class basic{
String eat;
String sleep;
basic(String eat,String sleep){
this.eat=eat;
this.sleep=sleep;
}
void getEat() {
System.out.println("食物:"+eat);
}
void getSleep() {
System.out.println("睡眠时间为:"+sleep);
}
}
public class cats implements animals{
就最后只能二选一嘛