Dart中类的getter和setter修饰符的用法

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class Rect{

  int height;
  int width;
 
  getArea(){
    return this.height*this.width;
  } 
}

class Rect{
  num height;
  num width; 
  
  Rect(this.height,this.width);
  area(){
    return this.height*this.width;
  }
}

void main(){
  Rect r=new Rect(10,4);
  print("面积:${r.area()}");   
}

Dart中类的getter

class Rect{
  num height;
  num width;   
  Rect(this.height,this.width);
  get area{
    return this.height*this.width;
  }
}

void main(){
  Rect r=new Rect(10,2);
  print("面积:${r.area}");      //注意调用直接通过访问属性的方式访问area
}

Dart中类的setter

class Rect{
  num height;
  num width; 
  
  Rect(this.height,this.width);
  get area{
    return this.height*this.width;
  }
  set areaHeight(value){
    this.height=value;
  }
}

void main(){
  Rect r=new Rect(10,4);
  // print("面积:${r.area()}");   
  r.areaHeight=6;

  print(r.area);

}