1 package day1.yppah02;
2
3 /*
4 2.8. Java中继承的注意事项
5
6 1. Java中类只支持单继承，不支持多继承
7 错误范例：class A extends B, C { }
8 2. Java中类支持多层继承
9 正确范例：calss B extends A { }
10 calss C extends B { }
11 */
12
13 /*public class Son extends Father, Mother{ //error
14
15 }*/
16
17 public class Son extends Father{
18
19 }
1 package day1.yppah02;
2
3 public class Mother {
4
5 public void dance(){
6 System.out.println("妈妈爱跳舞");
7 }
8
9 }
1 package day1.yppah02;
2
3 public class Father extends Granddad{
4
5 public void smoke(){
6 System.out.println("爸爸爱抽烟");
7 }
8
9 }
1 package day1.yppah02;
2
3 public class Granddad {
4
5 public void drink(){
6 System.out.println("爷爷爱喝酒");
7 }
8
9 }
