Java based Google Driving Direction

Pulling information from Google Today i create a desktop application which used previous post information to utilize the Google Map. In this application i get the same information in my application which you see on google map to find driving direction.

Here is the code which is used to grab all this information from Google into your application
First you need to download the html parser API which used in this application download Parser


---------------------------- start Mydirection class-----------------------------------

import java.awt.Color;

import java.awt.TextArea;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.Writer;

import java.net.HttpURLConnection;

import java.net.URL;

import java.text.DecimalFormat;

import java.util.StringTokenizer;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.htmlparser.Node;

import org.htmlparser.NodeFilter;

import org.htmlparser.Parser;

import org.htmlparser.filters.AndFilter;

import org.htmlparser.filters.HasAttributeFilter;

import org.htmlparser.filters.NodeClassFilter;

import org.htmlparser.tags.Div;

import org.htmlparser.tags.TableColumn;

import org.htmlparser.util.NodeList;

public class Mydirection

{

  String Latitude;

  String Longitude;

  String Loc1;

  String Loc2;

  public void FindDirection(String startloc, String endloc, String type)

  {

    try

    {

      startloc = startloc.replaceAll(" ", "+");

      endloc = endloc.replaceAll(" ", "+");

      String html = ReadHTML(startloc, endloc);

      Parser p = new Parser();

      p.setInputHTML(html);

      Parser p2 = new Parser();

      p2.setInputHTML(html);

      Parser p3 = new Parser();

      p3.setInputHTML(html);

      NodeFilter[] Filter = { new NodeClassFilter(TableColumn.class),

        new HasAttributeFilter("class", "ddptlnk noprint") };

      AndFilter af = new AndFilter(Filter);

      NodeList page = p.parse(af);

      NodeFilter[] Filter2 = { new NodeClassFilter(Div.class),

        new HasAttributeFilter("id", "sxdist") };

      AndFilter af2 = new AndFilter(Filter2);

      NodeList page2 = p2.parse(af2);

      if (type == "byName")

      {

        this.Loc1 = startloc;

        this.Loc2 = endloc;

        if (page2.size() == 0)

        {

          String startlatlong = findLatLong(startloc);

          String endlatlong = findLatLong(endloc);

          FindDirection(startlatlong, endlatlong, "byLatLong");

        }

      }

      String des = "";

      NodeFilter[] Filter3 = { new NodeClassFilter(Div.class),

        new HasAttributeFilter("class", "dir_snp") };

      AndFilter af3 = new AndFilter(Filter3);

      NodeList page3 = p3.parse(af3);

      if (page3.size() > 0) {

        Node as3 = page3.elementAt(0);

        des = as3.getNextSibling().toPlainTextString();

        des = des.replaceAll("x26#160;", " ");

      }

      ServerGUI2.TA.setText("");

      String start = this.Loc1.toUpperCase();

      String end = this.Loc2.toUpperCase();

      start = replacePluse(start);

      end = replacePluse(end);

      findLatLong(this.Loc1);

      double lat1 = Double.parseDouble(getLatitude());

      double lon1 = Double.parseDouble(getLongitude());

      findLatLong(this.Loc2);

      double lat2 = Double.parseDouble(getLatitude());

      double lon2 = Double.parseDouble(getLongitude());

      double AreaDis = getDistByHaversine(lat1, lon1, lat2, lon2, "km");

      DecimalFormat dec = new DecimalFormat("###.##");

      ServerGUI2.TA.setForeground(Color.BLACK.darker());

      ServerGUI2.TA.append("\t Driving directions from " + start + " to " + end + ": \n ");

      ServerGUI2.TA.append("\t Areal Distance:" + dec.format(AreaDis) + "  Driving Distance: " + des + "\n \n");

      ServerGUI2.TA.setForeground(Color.blue);

      if (page.size() > 0) {

        int increment = 1;

        for (int i = 0; i < page.size(); ++i) {

          Node as = page.elementAt(i);

          Node as2 = page2.elementAt(i);

          String distance = as2.toPlainTextString();

          distance = distance.replaceAll("x26#160;", " ");

          ServerGUI2.TA.append(increment + ": " +

            as.toPlainTextString() + " \t (" + distance + ") \n");

          ++increment;

        }

      } else {

        ServerGUI2.TA.setForeground(Color.red);

        ServerGUI2.TA.setText("");

        ServerGUI2.TA

          .append("\n \n Ohhhh Sorry i am not aware from this Location! \n");

      }

    }

    catch (Exception y)

    {

      y.printStackTrace();

    }

  }

  public String replacePluse(String ch)

  {

    CharSequence inputStr = ch;

    String patternStr = "\\+";

    String replacementStr = " ";

    Pattern pattern = Pattern.compile(patternStr);

    Matcher matcher = pattern.matcher(inputStr);

    String res = matcher.replaceAll(replacementStr);

    return res;

  }

  public String ReadHTML(String Startloc, String Endloc)

  {

    StringBuffer bf = new StringBuffer();

    Writer output = null;

    String output1 = "";

    try

    {

      String url = "http://www.google.com/mapmaker?hl=en&ctype=0&saddr=" +

        Startloc +

        "&daddr=" +

        Endloc +

        "&dirflg=&gw=56&ll=28.185932,70.704924&spn=8.824988,20.566406&z=6";

      URL urlcon = new URL(url);

      HttpURLConnection uc = (HttpURLConnection)urlcon.openConnection();

      BufferedReader in = new BufferedReader(

        new InputStreamReader(uc.getInputStream()));

      String inputLine;

      while ((inputLine = in.readLine()) != null)

      {

        String inputLine;

        bf.append(inputLine + "\n");

      }

      in.close();

      String st = bf.toString();

      byte[] b = st.getBytes();

      StringBuilder sss = new StringBuilder();

      for (int i = 0; i < b.length; ++i) {

        if (b[i] == 92)

          b[i] = 0;

        else {

          sss.append((char)b[i]);

        }

      }

      String res = sss.toString();

      CharSequence inputStr = res;

      String patternStr = "x3c";

      String replacementStr = "<";

      Pattern pattern = Pattern.compile(patternStr);

      Matcher matcher = pattern.matcher(inputStr);

      output1 = matcher.replaceAll(replacementStr);

      output1 = output1.replaceAll("x3e", ">");

    }

    catch (Exception t) {

      t.printStackTrace();

    }

    return output1;

  }

  public String findLatLong(String City)

  {

    String locLatlong = "";

    try

    {

      City = City.replaceAll(" ", "+");

      String url = "http://maps.google.com/maps/geo?q=" +

        City +

        "&+output=xml&oe=utf8\"" +

        "&sensor=true&key=ABQIAAAAVu6FLnwHDZ7nt0cmZfpnmRQVl2aZopxmRHQArsVnI0wW3Lv2qhQYvEEjT-yKshCHcutI9eBuDiqrIQ";

      URL urlcon = new URL(url);

      HttpURLConnection uc = (HttpURLConnection)urlcon.openConnection();

      BufferedReader in = new BufferedReader(

        new InputStreamReader(uc.getInputStream()));

      StringBuffer bf = new StringBuffer();

      String inputLine;

      while ((inputLine = in.readLine()) != null)

      {

        String inputLine;

        bf.append(inputLine + "\n");

      }

      in.close();

      StringTokenizer st = new StringTokenizer(bf.toString());

      while (st.hasMoreTokens())

        if (st.nextToken().startsWith("\"coordinates\"")) {

          st.nextToken();

          setLongitude(st.nextToken().replaceAll(",", ""));

          setLatitude(st.nextToken().replaceAll(",", ""));

          locLatlong = st.nextToken().replaceAll(",", "") + "," + st.nextToken().replaceAll(",", "");

        }

    }

    catch (Exception t)

    {

      t.printStackTrace();

    }

    return locLatlong;

  }

  public String getLatitude()

  {

    return this.Latitude;

  }

  public void setLatitude(String latitude)

  {

    this.Latitude = latitude;

  }

  public String getLongitude()

  {

    return this.Longitude;

  }

  public void setLongitude(String longitude)

  {

    this.Longitude = longitude;

  }

  double getDistByHaversine(double lat1, double lon1, double lat2, double lon2, String unit)

  {

    double dLat = lat2 - lat1;

    double dLong = lon2 - lon1;

    double a = Math.sin(deg2rad(dLat / 2.0D)) *

      Math.sin(deg2rad(dLat / 2.0D)) +

      Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *

      Math.sin(deg2rad(dLong / 2.0D)) *

      Math.sin(deg2rad(dLong / 2.0D));

    double c = 2.0D * Math.atan2(Math.sqrt(a), Math.sqrt(1.0D - a));

    return 6378.6999999999998D * c;

  }

  private double deg2rad(double deg)

  {

    return deg * 3.141592653589793D / 180.0D;

  }

  private double rad2deg(double rad)

  {

    return rad * 180.0D / 3.141592653589793D;

  }

---------------------------- End Mydirection class-----------------------------------

---------------------------- start ServerGUI2 class-----------------------------------

import java.awt.Color;

import java.awt.Frame;

import java.awt.Label;

import java.awt.TextArea;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.net.URL;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.JTextField;

class ServerGUI2 extends Frame

  implements ActionListener

{

  JButton exitButton;

  JButton connectButton;

  JButton okButton;

  static TextArea TA;

  private JTextField start;

  private JTextField end;

  Label l1;

  Label l2;

  JLabel hint;

  public ServerGUI2()

  {

    this.connectButton = new JButton(" Find ");

    this.connectButton.setBounds(130, 200, 90, 30);

    add(this.connectButton);

    this.connectButton.addActionListener(this);

    this.exitButton = new JButton(" Close ");

    this.exitButton.setBounds(240, 200, 90, 30);

    add(this.exitButton);

    this.exitButton.addActionListener(this);

    this.l1 = new Label("Starting Location");

    this.l2 = new Label("Ending Location");

    this.l1.setBounds(20, 60, 110, 25);

    this.l2.setBounds(20, 95, 100, 25);

    this.start = new JTextField("street city,proviance");

    this.end = new JTextField("street city,proviance");

// you can use any image or animation if need, set if required

    URL myurl = super.getClass().getResource("/beancar.gif");

    ImageIcon icon = new ImageIcon(myurl,

      "a pretty but meaningless splat");

    this.hint = new JLabel("Image and Text", icon, 0);

    this.hint = new JLabel(icon);

    this.hint.setBounds(470, 40, 140, 110);

    add(this.hint);

    this.hint.hide();

    this.start.setBounds(140, 60, 200, 25);

    this.end.setBounds(140, 90, 200, 25);

    add(this.l1);

    add(this.l2);

    add(this.start);

    add(this.end);

    setBackground(Color.lightGray);

    setLayout(null);

    setSize(700, 580);

    setTitle("You Never Lost");

    TA = new TextArea("", 10, 30);

    TA.setBounds(90, 250, 550, 310);

    add(TA);

    TA.disable();

  }

  public void actionPerformed(ActionEvent ae)

  {

    String str = ae.getActionCommand();

    if (str.equals(" Find ")) {

      String startloc = this.start.getText();

      String endloc = this.end.getText();

      Mydirection ob = new Mydirection();

      ob.FindDirection(startloc, endloc, "byName");

      this.hint.show();

      TA.enable();

    }

    if (str.equals(" Close "))

      System.exit(0);

  }

}

---------------------------- End ServerGUI2 class-----------------------------------

and last simple runner class..

---------------------------- End DirectionGUI  class-----------------------------------  

 public class DirectionGUI 

{

  public static void main(String[] args)

  {

    ServerGUI2 serverGUI = new ServerGUI2();

    serverGUI.show();

  }

}

---------------------------- End DirectionGUI  class-----------------------------------


If you using any editor like Eclipse simple create these classes and run the application using DirectionGUI class, A new Frame will open and you put your starting and ending point and press button and see the results in your application.

Thanks