摘要: 1 package inter; 2 3 public abstract class Door { 4 abstract void openDoor(); 5 abstract void closeDoor(); 6 } 7 8 9 package inter; 10 11 public inter 阅读全文
posted @ 2020-11-26 19:50 丁帅帅dss 阅读(86) 评论(0) 推荐(0)