D3EP4K C0DE

Friday, 30 March 2012

Remove Line Numbers

<html>

<head>

<title> Remove Line Numbers </title>



<style type="text/css">

html, body, textarea { height: 100%; width: 100%; margin: 0px; padding: 0px; border: 0px; }

textarea { width: 100%; height: 100%; background: none ; line-height: 20px; font-size: 15px; resize: none; outline:none; }



</style>

<script type="text/javascript">

var regex = new RegExp("^\\s*\\d+\\.?", "gm");



function removeLineNumber(textArea) {

textArea.value = textArea.value.replace(regex, "");

}

</script>



</head>

<body onload="document.getElementById('textarea').focus()">

<textarea id="textarea" onkeyup="removeLineNumber(this)" rows="50" cols="250">Paste your Code Here.</textarea>

        </body>


</html>

Monday, 26 March 2012

Java Web Service

This tutorial is for windows Users.

D:\>md jcode

D:\jcode>md ws-server

D:\jcode\ws-server>notepad HelloWorldWS.java

Paste the Below Code in notepad and Save.

package org.example.webservice;

import javax.jws.*;
import javax.xml.ws.Endpoint;

@WebService
public class HelloWorldWS{

    public String echo(String name) {
        return "HI ! ,"+name;
    }
  public static void main(String args[]){
       Endpoint.publish("http://localhost:8080/HelloWorldWS",new HelloWorldWS());
  }
}

The url along with the port can be changed to include ur ip address, so that it can be remotely accessed.
D:\jcode\ws-server>javac HelloWorldWS.java

D:\jcode\ws-server>md org

D:\jcode\ws-server>md org\exampleD:\jcode>md org\example\webservice

D:\jcode\ws-server>copy HelloWorldWS.class org\example\webservice

D:\jcode\ws-server>java org.example.webservice.HelloWorldWS

Keep this running. Now open another cmd window.
Also you can Check the WSDL from your browser, which will be consumed by the client, with the following link.
http://localhost:8080/HelloWorldWS?wsdl

D:\jcode\ws-server>cd ..

D:\jcode>md wsclient

D:\jcode>wsimport -s wsclient http://localhost:8080/HelloWorldWS?wsdl

D:\jcode>notepad wsclient\WSClient.java

Paste the Below Code in notepad and Save.

package wsclient;
import org.example.webservice.*;
public class WSClient {
    public static void main(String args[]){
        HelloWorldWS obj = (new HelloWorldWSService()).getHelloWorldWSPort();
        System.out.println(obj.echo(" World "));
    }
}

D:\jcode>javac wsclient/WSClient.java

D:\jcode>java -Dcom.sun.xml.internal.ws.transport.http.client.HttpTransportPipe.
dump=true wsclient.WSClient
---[HTTP request - http://localhost:8080/HelloWorldWS]---
Content-type: text/xml;charset="utf-8"
Soapaction: ""
Accept: text/xml, multipart/related, text/html, image/gif, image/jpeg, *; q=.2,
*/*; q=.2
<?xml version="1.0" ?><S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envel
ope/"><S:Body><ns2:echo xmlns:ns2="http://webservice.example.org/"><arg0> World
</arg0></ns2:echo></S:Body></S:Envelope>--------------------
---[HTTP response - http://localhost:8080 /HelloWorldWS - 200]---
Transfer-encoding: chunked
null: HTTP/1.1 200 OK
Content-type: text/xml;charset="utf-8"
<?xml version="1.0" ?><S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envel
ope/"><S:Body><ns2:echoResponse xmlns:ns2="http://webservice.example.org/"><retu
rn>HI ! , World </return></ns2:echoResponse></S:Body></S:Envelope>--------------
------
HI ! , World

SOAP REQUEST GENERATED :

<?xml version="1.0" ?>
<S:Envelope
      xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
       <S:Body>
                <ns2:echo xmlns:ns2="http://webservice.example.org/">
                      <arg0>World</arg0>
                </ns2:echo>
        </S:Body>
</S:Envelope>

SOAP RESPONSE GENERATED :

<?xml version="1.0"?>

<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">

  <S:Body>

    <ns2:echoResponse xmlns:ns2="http://webservice.example.org/">

      <return>HI ! ,World</return>

    </ns2:echoResponse>

  </S:Body>

</S:Envelope>

Tuesday, 3 January 2012

Thread Race in JAVA

1. Start Command Line on Windows.

Open cmd(Windows) or terminal(Unix)
Set Environment Variable JDK_HOME and JRE_HOME on Windows with jdk bin directory(eg. C:\Program Files\Java\jdk1.6.24\bin).
Set path to add these to two variables

eg. cmd> set path="%path%";%JDK_HOME%;%JRE_HOME
cmd>path

check javac and java commands in the command Line.
Try the following two commands in cmd.

cmd>javac -version
cmd>java -version

If the versions are different the reconfigure your paths

2.Type the following command in command line(Windows).

            cmd>copy con RaceCourse.java

3.Copy the following code and Paste into cmd. Press Ctrl+Z and your File gets        Saved.

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JPanel;

//THE RACE COURSE TO RUN ON

public class RaceCourse extends JPanel implements Runnable {

    private static final long serialVersionUID = 1L;
    
   int threadLength1, threadLength2, threadLength3;
    private static final int START_X = 50;
    
private static final int START_Y = 50;

    private static final int INC = 1;

    private static final int THREAD_WIDTH = 30;

    private static final int THREAD_SEPERATION = 90;

    boolean thread1 = false, thread2 = false;

    public RaceCourse() {

       

        threadLength1 = threadLength2 = threadLength3 = INC;

        setSize(getPreferredSize());

        RaceCourse.this.setBackground(Color.white);

    }

    public Dimension getPreferredSize() {

        return new Dimension(600, 400);

    }

    public void paintComponent(Graphics g) {

        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g;

         if (thread1) {

            g2d.setColor(new Color(200, 20, 20, 255));

            g2d.fillRect(START_X, START_Y, threadLength1, THREAD_WIDTH);

        }

        else if (thread2) {

            g2d.setColor(new Color(20, 200, 20, 255));

            g2d.fillRect(START_X, START_Y + THREAD_SEPERATION, threadLength2, THREAD_WIDTH);

        } else {

            g2d.setColor(new Color(20, 20, 200, 255));

            g2d.fillRect(START_X, START_Y + 2 * THREAD_SEPERATION, threadLength3, THREAD_WIDTH);

        }

    }

    // A comman run method shared by three Threads.

    public void run() {

        while (true)

            try {

                Thread.sleep(100);

                System.out.println("Current Thread:"
                        + Thread.currentThread().getName());

                if (Thread.currentThread().getName().equals("thread1")) {

                    thread1 = true;

                    thread2 = false;

                    threadLength1 = threadLength1 + INC;

                    repaint(START_X, START_Y, threadLength1, THREAD_WIDTH);

                    // this.wait();

                } else if (Thread.currentThread().getName().equals("thread2")) {

                    Thread.sleep(100);

                    // Thread.yield();

                    thread2 = true;

                    thread1 = false;

                    threadLength2 = threadLength2 + INC;

                    repaint(START_X, START_Y + THREAD_SEPERATION, threadLength2, THREAD_WIDTH);

                    // this.notify();

                } else {

                    Thread.sleep(400);

                    thread2 = false;

                    thread1 = false;

                    threadLength3 = threadLength3 + INC;

                    repaint(START_X, START_Y + 2 * THREAD_SEPERATION, threadLength3, THREAD_WIDTH);

                    // this.wait();

                }

            }

            catch (IllegalMonitorStateException is) {

                System.err.println("Error:" + is);

            } catch (InterruptedException ie) {

                System.err.println("Error:" + ie);

            }

    }

}

4.Compile the above Code
javac -d classes RaceCourse.java

Above command compiles the java file and stores into classes folder if it exists(create classes folder next to RaceCourse.java file if it doesn't exist)
If it compiles successfully without any errors go to next step.

5.Create a new File ThreadRace.java and paste the following code same as          step 3

            cmd>copy con ThreadRace.java
                     [paste your your code here]
                [Press Ctrl+Z]

import javax.swing.JFrame;
import javax.swing.JScrollPane;

public class ThreadRace extends JFrame {

    private static final long serialVersionUID = 1L;
    RaceCourse canvas;

    public ThreadRace() {

        super(" Race Course ");

        canvas = new RaceCourse();

        setSize(300, 300);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        getContentPane().add(new JScrollPane(canvas));

        setVisible(true);
        pack();
    }

    public static void main(String[] args) {

        ThreadRace course = new ThreadRace();

        Thread thread1 = new Thread(course.canvas, "thread1");

        Thread thread2 = new Thread(course.canvas, "thread2");
        Thread thread3 = new Thread(course.canvas, "thread3");

        thread1.setPriority(Thread.MAX_PRIORITY);
        thread2.setPriority(Thread.NORM_PRIORITY);
        thread3.setPriority(Thread.MIN_PRIORITY);

        thread1.start();
        thread2.start();
        thread3.start();

    }

}

6.Compile ThreadRace.java as shown in step 4

Check if ThreadRace.class and RaceCourse.class file is located in classes folder

7.Run ThreadRace.class from command prompt

cmd>java -classpath classes ThreadRace

Wednesday, 21 December 2011

Set up LAMP Server at home

1. Follow Ubuntu's Help to Install LAMP Server

https://help.ubuntu.com/community/ApacheMySQLPHP

2. Create a simple PHP file in /var/www/

Open a Terminal.
sudo gedit /var/www/info.php
Type your Password. Press Enter.
Paste the Following Code into opened File(/var/www/info.php).

<?php
echo "Hey There , This is Working."
phpinfo();
?>

Save the File.

3. Start your Apache Server.

sudo service apache2 restart

4.Open the PHP page in Browser.

http://localhost/info.php
http://127.0.0.1/info.php
http://<ur IP address>/info.php

5.If <You can see the below page> Continue Else Go To Step 1.

http://localhost/info.php

6.Create a sample MySQL Database .

Open a Terminal
admin@mooshtoo:~$ mysql -u root -p
Enter password:
Copy the Following Commands in the Terminal:

create database record;
create table record.student(
rno int,
name varchar(40),
phy int,
chem int,
math int
);

7.Create a Form in HTML.

sudo gedit /var/www/StudentForm.html
Enter Password:
Paste the Following Code in StudentForm.html and Save.

<HTML>
<Head>
      <title>Insert Student Record</title>
      <style type="text/css">
                  table{
                  border:1;
                  border-collapse:collapse;
                  font: normal 12px 'Lucida Grande',Verdana,sans-serif;
                  }
                  td{
                  color:#663333;font-family:verdana;
                  border-bottom: 1px solid #666;
                  padding-left:10px;
                  background-color:#F0F8FF;
                  }
                  #sub{ text-align:center;}
      </style>
</Head>
<body>
      <h2> Student Record Form </h2>
      <form action="dbinsert.php" method="POST" id="insert">
                  <table>
                              <tr>
                                       <td>Roll Number</td>
                                       <td><input type="text" size=40 name="rno"></td>
                              </tr>
                              <tr>
                                       <td>Name</td>
                                       <td><input type="text" size=40 name="name"></td>
                              </tr>
                              <tr>                                          
<td >Physics</td>
                                          <td><textarea  name="phy" cols=3 rows=1></textarea> </td>
                              </tr>
                              <tr>
                                          <td>Chemistry</td>
                                          <td><textarea  name="chem"  cols=3 rows=1></textarea> </td>
                              </tr>
                              <tr>
                                          <td>Mathematics</td>
                                          <td><textarea  name="math"  cols=3 rows=1></textarea> </td>
                              </tr>
                              <tr>
                                          <td colspan=2 id="sub"><input type="submit" name="submit" value="submit" ></td>
                              </tr>
                  </Table>
      </form>
</BODY>
</Html>

8. Now Write a PHP script to process the Student Form.

Create a new file /var/www/dbinsert.php
Paste the following code in it.

<?php

    $con = mysql_connect("localhost","root","<Your password>");
    if (!$con)
    {
        die('Could not connect: ' . mysql_error());
    }
    mysql_select_db("record", $con);
    $result = mysql_query("SELECT * FROM record.student");
    //Get data in local variable
    $v_rno=$_POST['rno'];
    $v_name=$_POST['name'];
    $v_phy=$_POST['phy'];
    $v_chem=$_POST['chem'];
    $v_math=$_POST['math'];
    // check for null values
    if ($v_rno==""  or $v_name=="")
    echo "All fields must be entered, hit back button and re-enter information";
    else{
    $query="insert into record.student      values($v_rno,'$v_name',$v_phy,$v_chem,$v_math)";
    mysql_query($query)  or die(mysql_error());
    echo "Your message has been received";
        }
?>
<br><br>
<!-- For Navigation -->
<a href='insertform.html'>Insert Another Record</a>
&nbsp; &nbsp;
<a href='dbresult.php'>Student Record</a>

9.Write another PHP script to Display Student Records.

Create a new file /var/www/dbresult.php
Paste the following code in it.

<?php
$con = mysql_connect("localhost","root","<Your password>");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
mysql_select_db("record", $con);
$result = mysql_query("SELECT * FROM record.student");
?>
<table border='1'>
<tr>
<th>Roll No.</th>
<th>Name</th>
<th>Physics</th>
<th>Chemistry</th>
<th>Mathematics</th>
</tr>
<?php
while($row = mysql_fetch_array($result))
{
  echo "<tr>";
  echo "<td>" . $row['rno'] . "</td>";
  echo "<td>" . $row['name'] . "</td>";
  echo "<td>" . $row['phy'] . "</td>";
  echo "<td>" . $row['chem'] . "</td>";
  echo "<td>" . $row['math'] . "</td>";
  echo "</tr>";

}
    mysql_close($con);
?>
        </table>
<br><br>
<!-- For Navigation -->

<a href='insertform.html' alt='New%20Student%20Record' >Insert Another Record</a>

10. Now test the following links in your browser.
http://127.0.0.1/insertform.html
http://127.0.0.1/dbinsert.php
http://127.0.0.1/dbresult.php