CodeEval - Find a Square - Moderate

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;


public class Main {
    public static void main (String[] args) throws FileNotFoundException, IOException {

    BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
    StringBuffer sb=new StringBuffer();
    String line;
    while ((line = in.readLine()) != null) {
        Point []points=new Point[4];
        StringTokenizer st=new StringTokenizer(line," ");
        for(int i=0;i<4;i++){
            points[i]=parsePoint(st.nextToken());
        }
        Point center=new Point(0,0);
        for(int i=0;i<4;i++){
            center.x+=points[i].x;
            center.y+=points[i].y;
        }
        center.x/=4;
        center.y/=4;
        boolean flag=true;
        double dist=eculDist(center, points[0]);
        for(int i=1;i<4;i++){
            double temp=eculDist(center, points[i]);
            if(temp!=dist){
                 sb.append(false).append("\n");
                 flag=false;
                 break;
            }
        }
        if(flag){
            int counter=0;
            for(int i=1;i<4;i++){
                if(dotProd(difPoint(points[0], center), difPoint(points[i], center))==0)
                        counter++;
            }
            if(counter==2){
                sb.append(true).append("\n");
            }
            else{
                sb.append(false).append("\n");
            }
        }
       
    }
    System.out.print(sb);
  }
   
    static double eculDist(Point p1,Point p2){
        return Math.sqrt(((p1.x-p2.x)*(p1.x-p2.x))+((p1.y-p2.y)*(p1.y-p2.y)));
    }
   
    static double dotProd(Point p1,Point p2){
        return p1.x*p2.x+p1.y*p2.y;
    }
   
    static Point difPoint(Point p1,Point p2){
        return new Point(p1.x-p2.x,p1.y-p2.y);
    }
   
    static Point parsePoint(String string){
        StringBuilder str=new StringBuilder(string);
        str.deleteCharAt(0);
        if(str.charAt(str.length()-1)==',')
            str.deleteCharAt(str.length()-1);
        str.deleteCharAt(str.length()-1);
        StringTokenizer st2=new StringTokenizer(str.toString(),",");
        return new Point(Integer.parseInt(st2.nextToken()),Integer.parseInt(st2.nextToken()));
    }
}

class Point{
    double x;
    double y;

    public Point(double x, double y) {
        this.x = x;
        this.y = y;
    }
   
   
}