Get Geocoordinates from Wifi Access Points

import java.io.*;
import java.util.*;
import java.net.*;
import java.applet.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class getGPSLocation extends Applet{
//public class getGPSLocation{
    //public static void main(String[] args) {
    public void init(){
        String result = null;
        if (isWindows()) {
            System.out.println("\nThis is Windows Machine");
            result=getWindows();
        } else if (isMac()) {
            System.out.println("\nThis is Mac Machine");
            result=getMac();
        } else {
            System.out.println("\nYour OS is not support!!");
        }
        //System.out.println(result);
    }

    public static String getWindows(){
            String result = null;
            try {

                ArrayList ssidList = new ArrayList();
                ArrayList bssidList = new ArrayList();
                ArrayList rssiList = new ArrayList();

                Process p = Runtime.getRuntime().exec("netsh wlan show networks mode=bssid");
                BufferedReader in = new BufferedReader(
                                    new InputStreamReader(p.getInputStream()));
                String line = null;
                String signal = null;
                String ssidStr = null;

                while ((line = in.readLine()) != null) {

                    Pattern p1 = Pattern.compile("(SSID\\s\\d+\\s:)\\s([\\w\\s]*)");
                    Matcher m1 = p1.matcher(line);
                    if(m1.find()){
                        ssidStr = m1.group(2);
                        ssidStr = ssidStr.replaceAll(" ","%20");
                        ssidList.add(ssidStr);
                    }
                    Pattern p2 = Pattern.compile("(BSSID\\s1\\s*:)\\s((.?)*)");
                    Matcher m2 = p2.matcher(line);
                    if(m2.find()){
                        bssidList.add(m2.group(2));
                    }
                    Pattern p3 = Pattern.compile("(Signal\\s*):\\s((.?)*)");
                    Matcher m3 = p3.matcher(line);
                    if(m3.find()){
                        signal = m3.group(2);
                        signal = signal.replaceAll("%","");
                        signal = signal.replaceAll(" ","");
                        signal = "-"+signal;
                        rssiList.add(signal);
                    }
                }
                int arraySize=ssidList.size();
                if(arraySize==0){
                    result="I don't know where the target is";
                }
                else{
                    result=googleLookup(bssidList,ssidList,rssiList);
                }
             } catch (IOException e) {
                e.printStackTrace();
            }
        return result;
    }

    public static String googleLookup(ArrayList bssidList,ArrayList ssidList,ArrayList rssiList){
        String result = null;
        try {
            int j=0;
            String queryString = "https://maps.googleapis.com/maps/api/browserlocation/json?browser=firefox&sensor=true";
            while(j<ssidList.size()){
                queryString+="&wifi=mac:";
                queryString+=bssidList.get(j);
                queryString+="%7C";

                queryString+="ssid:";
                queryString+=ssidList.get(j);

                queryString+="%7C";
                queryString+="ss:";
                queryString+=rssiList.get(j);
                j++;
            }

            //Get geocoordinates / Longitude and Latitude
            String geoCoordinates = null;

            //System.out.println("Query string: "+queryString);

            URL url = new URL(queryString);
            URLConnection urlc = url.openConnection();
            urlc.setRequestProperty("User-Agent", "Mozilla 5.0 (Windows; U; "+ "Windows NT 5.1; en-US; rv:1.8.0.11) ");
            BufferedReader reader = new BufferedReader(new InputStreamReader(urlc.getInputStream()));
            for (String output; (output = reader.readLine()) != null;) {
                if(output.indexOf("18000.0")>0){
                    result+="Location is not accurate\n";
                    System.out.println("Location is not accurate");
                }
                else{
                    if(output.indexOf("lat")>0){
                        output = output.replace("\"lat\" : ","");
                        output = output.replaceAll("^\\s+", "");
                        geoCoordinates = output;
                        result+="Latitude: ";
                        result+=output;
                        System.out.println("Latitude: "+output);
                    }
                    if(output.indexOf("lng")>0){
                        output = output.replace("\"lng\" : ","");
                        output = output.replaceAll("^\\s+", "");
                        geoCoordinates += output;
                        result+="Longitude: ";
                        result+=output;
                        System.out.println("Longitude: "+output);
                    }
                }

            }


            //Reverse geocoordinates to street address
            String reverseGeo = "https://maps.googleapis.com/maps/geo?q="+geoCoordinates+"&output=json&sensor=true_or_false";

            System.out.println(reverseGeo);

                URL url1 = new URL(reverseGeo);
                URLConnection urlc1 = url1.openConnection();
                urlc1.setRequestProperty("User-Agent", "Mozilla 5.0 (Windows; U; "+ "Windows NT 5.1; en-US; rv:1.8.0.11) ");
            BufferedReader reader1 = new BufferedReader(new InputStreamReader(urlc1.getInputStream()));
            for (String output1; (output1 = reader1.readLine()) != null;) {
                if(output1.indexOf("address")>0){
                    output1 = output1.replace("\"address\": ","");
                    output1 = output1.replace("\",","");
                    output1 = output1.replace("\"","");
                    output1 = output1.replaceAll("^\\s+", "");
                    result+="Address is ";
                    result+=output1;
                    System.out.println("Address is "+output1);
                }
            }
            String mapAddress = "http://maps.google.com/maps?q="+geoCoordinates+"+%28You+are+located+here%29&iwloc=A&hl=en";
            result+="\n"+mapAddress;
            System.out.println("\n"+mapAddress);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    public static String getMac(){
        String result = null;
        try {
                Process p = Runtime.getRuntime().exec("/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -s");
                BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
                String line = null;
                String ssidStr = null;
                String signal = null;

                String queryString = "https://maps.googleapis.com/maps/api/browserlocation/json?browser=firefox&sensor=true";

                ArrayList ssidList = new ArrayList();
                ArrayList bssidList = new ArrayList();
                ArrayList rssiList = new ArrayList();

                line = in.readLine();
                while ((line = in.readLine()) != null) {
                    line = line.replaceAll("^\\s+", "");

                    //Pattern p1 = Pattern.compile("((.?)*\\s\\w*):(\\w*:\\w*:\\w*:\\w*:\\w*)\\s((.?)*)\\s(\\d+)");
                    Pattern p1 = Pattern.compile("((.?)+)\\s(..:..:..:..:..:..)\\s(-\\d*)");
                    Matcher m1 = p1.matcher(line);
                    if(m1.find()){
                        ssidStr = m1.group(1);
                        ssidStr = ssidStr.replaceAll(" ","%20");
                        ssidList.add(ssidStr);

                        //System.out.println("ssid: "+ssidStr);

                        bssidList.add(m1.group(3));
                        //System.out.println("bssid: "+m1.group(3));

                        signal = m1.group(4);
                        signal = signal.replaceAll(" ","");

                        //System.out.println("signal: "+signal);
                        rssiList.add(signal);
                    }

                }
            int arraySize=ssidList.size();
            if(arraySize==0){
                result="I don't know where the target is";
                System.out.println("I don't know where the target is");
            }
            else{
                result=googleLookup(bssidList,ssidList,rssiList);

            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    public static boolean isWindows() {

        String os = System.getProperty("os.name").toLowerCase();
        // windows
        return (os.indexOf("win") >= 0);

    }

    public static boolean isMac() {

        String os = System.getProperty("os.name").toLowerCase();
        // Mac
        return (os.indexOf("mac") >= 0);

    }

    public static boolean isLinux() {

        String os = System.getProperty("os.name").toLowerCase();
        // linux or unix
        return (os.indexOf("nix") >= 0 || os.indexOf("nux") >= 0);

    }

    }