Dart语法一些注意的点:

!!!extends抽象类和 implements的区别：

Name		Name	Last commit message	Last commit date
Latest commit History 15 Commits
08-私有属性		08-私有属性
.gitignore		.gitignore
.packages		.packages
01-hello-world.dart		01-hello-world.dart
02-var-const.dart		02-var-const.dart
03-String-int-long-bool-List-Map-if.dart		03-String-int-long-bool-List-Map-if.dart
04-运算符.dart		04-运算符.dart
05-循环语句.dart		05-循环语句.dart
06-List-Map-常用属性和方法-Set.dart		06-List-Map-常用属性和方法-Set.dart
07-函数(上).dart		07-函数(上).dart
07-函数(下).dart		07-函数(下).dart
08-getter-setter-static.dart		08-getter-setter-static.dart
08-命名构造函数.dart		08-命名构造函数.dart
08-构造函数.dart		08-构造函数.dart
08-私有属性-私有方法.dart		08-私有属性-私有方法.dart
09.abstract.dart		09.abstract.dart
09.对象操作符-继承.dart		09.对象操作符-继承.dart
10.interface.dart		10.interface.dart
11.implements-mixins.dart		11.implements-mixins.dart
12.generic.dart		12.generic.dart
13.lib.dart		13.lib.dart
14.publib.dart		14.publib.dart
README.md		README.md
pubspec.yaml		pubspec.yaml