circledemo3.java

180个针对Java初学者的简单实例180个针对Java初学者的简单实例180个针对Java初学者的简单实例

class Circle {
  final static double PI=3.14;
  private  double dbRadius=1;
  public Circle(double dbRadius){
    this.dbRadius=dbRadius;
  }
  public double Area(){
    double area;
    area=PI*dbRadius*dbRadius;
    return area;
  }
}
public class CircleDemo3{
  public static void main(String[] args) {
    Circle[] circleArray;
    double dbSumArea=0.0;//保存圆面积的总面积
    circleArray = new Circle[5];
    for (int i = 1; i <= 5; i++) {
      circleArray[i-1] = new Circle(i);
    }
    for (int i=0;i<circleArray.length;i++) {
        System.out.println(circleArray[i].Area());
        dbSumArea += circleArray[i].Area();
     }
     System.out.println("总面积为：" + dbSumArea);
  }
}