11.Dart中一个类实现多个接口 以及Dart中的Mixins

abstract class A{
  String name;
  printA();
}

abstract class B{
  printB();
}

class C implements A,B{   //鼠标放在C处，选择快速修复
  @override
  String name;  
  @override
  printA() {
    print(‘printA‘);
  }
  @override
  printB() {
    // TODO: implement printB
    return null;
  }

  
}


void main(){

  C c=new C();
  c.printA();

}

//A类和B类不能继承其他类
class A {
  String info="this is A";
  void printA(){
    print("A");
  }
}

class B {
  void printB(){
    print("B");
  }
}

class C with A,B{
    
}

void main(){
  
  var c=new C();  
  c.printA();
  c.printB();
  print(c.info);

}

class Person{
  String name;
  num age;
  Person(this.name,this.age);
  printInfo(){
    print(‘${this.name}----${this.age}‘);
  }
  void run(){
    print("Person Run");
  }
}

class A {
  String info="this is A";
  void printA(){
    print("A");
  }
  void run(){
    print("A Run");
  }
}

class B {  
  void printB(){
    print("B");
  }
  void run(){
    print("B Run");
  }
}

class C extends Person with B,A{  //C继承Person,然后mixins B和A
  C(String name, num age) : super(name, age);
  
}

void main(){  
  var c=new C(‘张三‘,20);  
  c.printInfo();
  // c.printB();
  // print(c.info);

   c.run();  //当A和B中有同样的方法时，with B,A  谁在后执行谁


}