public abstract class Shape { public abstract void getArea(); ? ? ? ?public abstract void getPeri(); } public class Rectangle extends Shape { public void getArea() { ? ? ? //這里為什么報錯啊 System.out.println("為啥還是報錯"); } public void getPeri() { ? ? ? //這里為什么報錯啊 System.out.println("為啥還是報錯");