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Tinh do dai doan thang

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Tinh do dai doan thang

Post  Admin on Thu Feb 10, 2011 8:10 am

Dau tien ta co lop diem

Code:
class Point
{
   public  int x;
   public  int y;
   public Point()
   {
      x=1;
      y=1;
   }
   //
   public Point(int X,int Y)
   {
      x=X;
      y=Y;
   }
   public String ShowPoint()
   {      
      String temp;
      temp="Diem co toa do la: (" + x + "," + y + ")";
      return (temp);
   }
   
}

Dua vao lop diem tren ta khai bao mot duong thang gom hai diem va sau do tinh khoang cach hai diem cua mot doan thang

Code:
class Line extends Diem
{
   private  Point ePoint;
   private  Point fPoint;
   public Line()
   {
      Point p1=new Point(1,1);
      Point p2=new Point(1,1);
      ePoint=p1;
      fPoint=p2;
   }
   public Line(Point p1,Point p2)
   {
      ePoint=p1;
      fPoint=p2;
   }
   public double DD(Line k)
   {
      double kk;
      int Ax=k.ePoint.x;
      int Ay=k.ePoint.y;
      int Bx=k.fPoint.x;
      int By=k.fPoint.y;
      kk=Math.sqrt(((Ax-Bx)*(Ax-Bx))+((Ay-By)*(Ay-By)));
      return (kk);
   }
   public double DD(Point p1,Point p2)
   {
      double kk;
      int Ax=p1.x;
      int Ay=p1.y;
      int Bx=p2.x;
      int By=p2.y;
      //+((Ay-By)^2)
      kk=Math.sqrt(((Ax-Bx)*(Ax-Bx))+((Ay-By)*(Ay-By)));
      return (kk);
   }
   public void ShowLine()
   {
      String s;
      s="Toa do dau: (" + ePoint.x+","+ePoint.y+") toa do cuoi: (" + fPoint.x+","+fPoint.y+")";
      System.out.print(s);
   }
}
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