package day11Test1;
public class XingZhuang {
public static void abc(XingZhuang xz) {
if (xz instanceof YuanXing) {
((YuanXing) xz).r = 2;
System.out.println(((YuanXing) xz).mianJi());// 圆形的面积
System.out.println(((YuanXing) xz).zhouChang());// 圆形的周长
} else if (xz instanceof ChangFangXing) {
((ChangFangXing) xz).chang = 10;
((ChangFangXing) xz).kuan = 10;
System.out.println(((ChangFangXing) xz).mianJi());// 长方形的面积
System.out.println(((ChangFangXing) xz).zhouChang());// 长方形的周长
}
}
}
