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AIM:

To develop an RMI application that allows a client to transfer or download any

types of files from a remote machine.

ALGORITHM:

Step 1: Start the program.

Step 2: In the Client, x

get the user input for directory, file name.

Step 3: Create a new file in the directory with the specified file name.

Step 4: Create an object for the remote interface downserver.

Step 5: Use lookup() to search for JNDI name and download the file contents.

Step 6: The client invokes methods in Remote interface to download the file.

Step 7: Compile all the files by using set path= C:\Program

Files\Java\jdk1.6.0_02\bin

Step 8: Start RMI registry and compile the downimpl program.

Step 9: Run the client and display the result.

Step 10: Stop the program.

SOURCE CODE

/* downserver.java */

import java.rmi.*;

import java.io.*;

public interface downserver extends Remote

{

String download(File f) throws RemoteException;

}

/* dclient.java */

import java.rmi.*;

import java.io.*;

public class dclient

{

public static void main(String args[])

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Ex No: 1

Date: 01/07/11REMOTE METHOD INVOCATION

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{

try

{

String file,dir;

BufferedReader din=new BufferedReader(new InputStreamReader

(System.in));

System.out.println("Enter directory name:");

dir=din.readLine();

System.out.println("Enter the file name:");

file=din.readLine();

File ff=new File(dir,file);

downserver dr=(downserver)Naming.lookup("rmi://localhost/downimpl");

String s=dr.download(ff);

System.out.println(s);

}

catch(Exception e)

{ } } }

/* downimpl.java */

import java.rmi.*;

import java.io.*;

import java.rmi.server.*;

public class downimpl extends UnicastRemoteObject implements downserver

{

public downimpl() throws RemoteException

{

}

public String download(File f)

{

String str=" ";

try

{

FileInputStream in=new FileInputStream(f);

int l=in.available();

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for(int i=1;i

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Next we will run the server program (downimpl.java) in following manner

Now we will open another command prompt and run the client program

(dclient.java) in following manner. We will get the output.

RESULT

Thus the above application Remote Method Invocation has been executedsuccessfully.

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AIM:

To implement the Java Bean to draw graphical objects and to display it in

Frame.

ALGORITHM

Step 1: Start->All Programs->Net BeansIDE Choose File->New Project in dialog Box.

Choose category as General and select Project as Java Application.

Step2 : Give Project name: JavaBean & deselect Create Main class and set as Main

project. Click finish to create the class.

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Ex No:2

Date: 08/07/11CREATING JAVA BEAN

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Now we will get the following window.

Right Click Java Bean->New->Java Class and give class name as JavaBean

Step 3: In left pane Double click on JavaBean.java. Now in right side pane type the

corresponding code.

Step 4: Now we compile the JavaBean.java code in following manner. In left side

panner Right click the JavaBean.java -> Compile File

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Step 5: Next we will select Files Tab in Left Side Pane and double click the build.xml

file from JavaBean Folder. Now we add our own xml - code after the comment with in

the tag.

Step 6: Now we compile the above build.xml code in the following manner. Right

Click build.xml -> Run Target -> Other Targets -> build Please following the below

screen.

Step 7:Next we double click the JavaBean.jar file from left pane in Files Tab, we got

MANIFEST.MF file.

Now we will open the MANIFEST.MF (Double click) file and check the

following information is correct or not.

Name: JavaBean.class

Java-Bean: true

Step 8: Next we will create one Java Frame class in the following manner Select

Projects Tab ->JavaBean Right Click -> New JFrame Form. Now we give the class

name as BeanLoader and click finish.

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Step 9: In palette Explorer (it available from Right side) Right click the Palette

Explorer - >Choose Palette Manager. Now we will get the following Dialog box.

Step 10: In palette Manager Dialog box Please click the Add from JAR Button Now

we will get the following Dialog box

Please select the appropriate JavaBean.jar file from your corresponding Project

Folder then click -> next Now choose the available components to add to the palette

then click->next

Now choose the palette category where to add the components. Here Beans

has been selected. Then click finish.

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Now the Palette Manager Dialog box will appear with selection of Beans

Component then ->close.

Now go to Palette Explorer and Click the Beans Division check whether the

corresponding JavaBean has been added or not.

Now Drop the JavaBean Component from Beans Division and drag into the

BeanLoader.java Frame window.

Next we will run the BeanLoader.java. Right click BeanLoader.java -> click

Run File. Now we got the following output

SOURCE CODE

File Name: JavaBean.java

import java.awt.Color;

import java.beans.XMLDecoder;

import javax.swing.JLabel;

import java.io.Serializable;

public class JavaBean extends JLabel implements Serializable {

public JavaBean() {

setText( "MiddleWare" );

setOpaque( true );

setBackground( Color.RED );

setForeground( Color.YELLOW );

setVerticalAlignment( CENTER );

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setHorizontalAlignment( CENTER );

} }

XML coding:

SCREEN OUTPUT

RESULT:

Thus the above application Java Beans has been executed successfully.

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AIM:

To develop a simple calculator in EJB Application to perform a basic

mathematical operations.

PROCEDURE / ALGORITHM

Step1:

Start All ProgramsNetBeansFile Menu Select New Project Choose Java

(Categories) and Enterprise Application (Projects)and click next.

Step : 2

In Name and Location Menu give the Project name and Click Next. Set the

Server as Glass Fish, Select the Java Version, Check the Selection of EJB Module

and Web Application Module and click finish.

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Ex No: 3

Date: 15/07/11CREATING A SIMPLE CALCULATOR USING EJB

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Step 3:

Ensure the name of the Project (Calculator), EJB Module(Calculator-ejb) and

Web Application module (Calculator-war) was created.

Right Click EJB Module Select Session Bean Give EJB Name Give

Package Name Select the Session type as Stateless Check the interface as

Remote click Finish.

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Step 4:

Ensure the Creation of a Bean (CalculatorBean) and Remote interface

(CalculatorBeanRemote) file

Type the coding for the Remote interface java file

Type the coding in the Java Bean file

Step 5:

Select The Web Application module (War File), Right click on WebPages

Select jsp/ html Create the Client form (form.jsp) type the following code in form.jsp

Type the Coding for form.jsp

Step 6:

Now Create a Servlet file to handle the client request. The Request method was

either GET/POST.

Right click on the source package of Calculator-war and select Servlet and

name it as WebServlet and click finish

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Step7:.

Inserting the Enterprise Bean in the Servlet File. Right Click inside the Servlet

file (WebServlet.java) Select Insert code Select Call Enterprise Bean Select

the Enterprise Bean (CalculatorBean) click Ok. Ensure the import statement coding

has the import calculator.CalculatorRemote; and in the Coding line

@EJB

private CalculatorRemote calculatorBean;

Type the coding for WebServlet.java

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Step 8:

Build, Deploy and Run the Project

Right click the Project Select Clean & Build

Right Click the Project

Select DeployRight Click the Project Run

Clean & Build

Deploy & Run

Step 9:

Observe the output in Web Browser

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SOURCE CODE

CalculatorBeanRemote.java

package calculator;

import javax.ejb.Remote;

import java.math.*;

import java.lang.annotation.*;

@Remote

public interface CalculatorRemote

{

public float add(float x,float y);

public float subtract(float x,float y);

public float multiply(float x,float y);

public float division(float x,float y);

}

CalculatorBean.java

package calculator;

import javax.ejb.Stateless;

import java.math.*;import javax.ejb.Remote;

@Stateless(name="CalculatorBean")

@Remote(CalculatorRemote.class)

public class CalculatorBean implements CalculatorRemote

{

public float add(float x,float y)

{ return x+y; }

public float subtract(float x,float y)

{ return x-y; }

public float multiply(float x,float y)

{ return x*y; }

public float division(float x,float y)

{ return x/y; } }

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form.jsp

Calculator

Calculator

Enter first value:

Enter second value:

Select your choice AdditionSubtraction

MultiplicationDivision

index.jsp

JSP Page

Welcome to EJB Stateless Session Bean

Click to call the

Bean

WebServlet.java

import java.io.*;

import java.net.*;

import javax.servlet.*;

import javax.servlet.http.*;

import javax.ejb.*;

import calculator.CalculatorRemote;

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public class Webservlet extends HttpServlet {

@EJB

private CalculatorRemote calculatorBean;

protected void doGet(HttpServletRequest request, HttpServletResponse

response)throws ServletException, IOException {

response.setContentType("text/html;charset=UTF-8");

PrintWriter out=response.getWriter();

float result=0;

System.out.println(result);

try {

String s1=request.getParameter("num1");

String s2=request.getParameter("num2");

String s3=request.getParameter("group1");

if(s1!=null && s2!=null) {

System.out.println(s3);

Float num1=new Float(s1);

Float num2=new Float(s2);

if(s3.equals("add"))

{

result=calculatorBean.add(num1.floatValue(),num2.floatValue());

out.println();

out.println("The Result For The Choice

ADDITION
");

out.println("");

out.println("The Number1 is:

"+num1+"");


"+num2+"");

out.println("The Result is:

"+result+"");

out.println("""); }

else if(s3.equals("subtract")) {

result=calculatorBean.subtract(num1.floatValue(),num2.floatValue());

out.println("");

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SUBTRACT
");

out.println("");


"+num1+"");


"+num2+"");


"+result+"");

out.println(""); }

else if(s3.equals("multiply")) {

result=calculatorBean.multiply(num1.floatValue(), num2.floatValue());

out.println("");

out.println("The Result For The Choice MULTIPLICATION

");

out.println("");


"+num1+"");


"+num2+"");


"+result+"");

out.println(""); }

else {

result=calculatorBean.division(num1.floatValue(),num2.floatValue());

out.println("");


DIVISION
");

out.println("");


"+num1+"");


"+num2+"");


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"+result+"");

out.println(""); } } }

catch(Exception e)

{ e.printStackTrace(); } }

SCREEN OUTPUT

Screen shot 1:

Screen shot 2:

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Screen Shot 3:

RESULT

Thus the above application Simple Calculator using EJB has been executed

successfully.

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AIM:

To develop a simple EJB Application to perform a Bank Transaction operations.


Step1:

Start All ProgramsNetBeansFile Menu Select New Project

Choose Java (Categories) and Enterprise Application (Projects) and click next.

Step: 2


Server as Glass Fish, Select the Java Version, Check the Selection ofEJB Module and

Web Application Module and click finish.

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Ex No: 4

Date: 22/07/11CREATING A SIMPLE BANK TRANSACTION USING

EJB

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Step 3:

Ensure the name of the Project (BankApplication), EJB Module

(BankApplication-ejb) and Web Application module (BankApplication-war) was

created.


Package Name Select the Session type as Stateful Check the interface as


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Step4:

Ensure the Creation of a Bean (BankApplication.java) and Remote interface

(BankApplicationRemote.java) file



Step5:


Select jsp/ html Create the Client form (BankForm.jsp) type the following code in

BankForm.jsp

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Type the Coding for BankForm.jsp

Step 6


either GET/POST.

Right click on the source package ofBankApplication-war and select Servlet

and name it as BankServlet and click finish

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Step7:.


file (BankServlet.java) Select Insert code Select Call Enterprise Bean Select

the Enterprise Bean (BankApplication) click Ok. Ensure the import statement coding

has the import BankApplication.BankApplicationRemote; and in the Coding line

BankApplicationRemote bankApplication = lookupBankApplicationRemote();

Type the coding for BankServlet.java

Step 8:

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Right Click the Project Select Deploy

Right Click the Project Run

Clean & Build

Deploy & Run

Step 9:


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Enter the amount in rupees:

Select your choice:Deposit

Withdraw

index.jsp

JSP Page

Welcome to EJB Stateful Session Bean

Click to call the Bean

BankServlet.java

import BankApplication.BankApplicationRemote;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class BankServlet extends HttpServlet {

BankApplicationRemote bankApplication = lookupBankApplicationRemote();

protected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// processRequest(request, response);

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PrintWriter out=response.getWriter();

float result=0;

try {

String s1=request.getParameter("amt");



Float amt=new Float(s1);

if(s2.equals("dep")) {

result=bankApplication.deposit(amt.floatValue());

out.println("");

out.println("

Bank Transaction Form
");
out.println("");

out.println(" Rs."+amt+" /-was Deposited in your

Account");

out.println(" current balance isRs."+result+"/-

");

out.println("Back To Transaction

Form");

out.println(""); }

else if(s2.equals("with")) {

result=bankApplication.withdraw(amt.floatValue());

out.println("");

out.println("

Bank Transaction Form
");
out.println("");

out.println(" Rs."+amt+" /-was With Drawn From

your Account");

out.println(" current balance isRs."+result+"/-

");

out.println("Back To Transaction

Form");

out.println(""); } } }

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catch(Exception e)

{ e.printStackTrace(); } }

SCREEN OUTPUT

Screen shot 1:

Screen shot 2:

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Screen Shot 3:

Screen Shot 4:

RESULT

The above application Simple Bank Transaction using EJB has been executed

successfully.

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AIM:

To develop a simple EJB Application to perform Library Management

operations.


Step1:

Start All ProgramsNetBeansFile Menu Select New Project

Choose Java (Categories) and Enterprise Application (Projects) and click next.

Step 2


Server as Glass Fish, Select the Java Version, Check the Selection ofEJB Module and

Web Application Module and click finish.

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Ex No: 5

Date: 29/07/11CREATING A SIMPLE LIBRARY MANAGEMENT

USING EJB

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Step 3:

Ensure the name of the Project (LIB), EJB Module (LIB-ejb) and Web

Application module (LIB-war) was created.


Package Name Select the Session type as Stateful Check the interface as


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Step4:

Ensure the Creation of a Bean (LIBBean.java) and Remote interface

(LIBBeanRemote.java) file



Step5:


Select jsp/ html Create the Client form (LIBForm.jsp) type the following code in

LIBForm.jsp

Type the Coding for LIBForm.jsp

Step6:


either GET/POST.

Right click on the source package ofLIB-war and select Servlet and name it as

LIBServ.java and click finish

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Step7:


file (LIBServ.java) Select Insert code Select Call Enterprise Bean Select the

Enterprise Bean (LIBBean) click Ok. Ensure the import statement coding has the

import LIB.LIBBeanRemote; and in the Coding line

LIBBeanRemote lIBBean = lookupLIBBeanRemote();

Type the coding for LIBServ.java

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Step 8:



Right Click the Project Select Deploy

Right Click the Project Run

Clean & Build

Deploy

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Step 9:


SOURCE CODELIBBeanRemote.java

package LIB;

import javax.ejb.Remote;

import java.rmi.RemoteException;

@Remote

public interface LIBBeanRemote {

public String Issue(String acno,String bname)throws RemoteException;

public String Return(String acno)throws RemoteException; }

LIBBean.java

package LIB;

import javax.ejb.Stateful;

@Stateful

public class LIBBean implements LIBBeanRemote {

private static int count=0;

private String c_no[]=new String[100];

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private String ac_no[]=new String[100];

@Override

public String Issue(String acno,String bname) {

ac_no[count]=acno;

c_no[count]=bname;

count++;

return "Successfully Issued"; }

@Override

public String Return(String acno) {

for(int i=0;i

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LIBServ.java

import LIB.LIBBeanRemote;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class LIBServ extends HttpServlet {

LIBBeanRemote lIBBean = lookupLIBBeanRemote();

@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// processRequest(request, response);


PrintWriter out = response.getWriter();

String result="";

try {

String s1=request.getParameter("acno");

String s2=request.getParameter("bname");



if(s3.equals("iss")) {

result=lIBBean.Issue(s1,s2);

out.println("Welcome");

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out.println("The Book Bearing Account No" + s1 + "and title" + s2 + "was" +

result + ""); }

else if(s3.equals("with"))

{

result=lIBBean.Return(s1);

out.println("The Book Bearing Account No" + s1 + "was" + result + "");

} }

out.println("Go Home Page"); }

catch(Exception e){} }

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SCREEN OUTPUT

Screen shot 1:

Screen shot 2:

Screen Shot 3

RESULT

Thus the above application Library Management System using EJB has been

executed successfully.

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AIM:

To write a program to create an Active-X control in C#.NET

ALGORITHM:

Step 1: Start the process

Step 2: Click start->All programs->Microsoft Visual Studio 2005-> Microsoft

Visual Studio 2005->File->New Project->Project Types as Visual C# and

Templates as Windows Application

Step 3: Design the form with the following controls in the form

RichTextBox

Save Command Button

Open Command Button

Color Command Button

SaveFileDialog Control

OpenFileDialog control

ColorDialog Control

Step 4: Write event handling procedures for Save, Open and Color commands

Step5: Execute the program

Step 6: Stop the program

FORM DESIGN

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Ex No: 6

Date: 05/08/11ACTIVEX CONTROL

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SOURCE CODE

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace ActControl {

public partial class Form1 : Form {

public Form1()

{ InitializeComponent(); }

private void button1_Click(object sender, EventArgs e)

{

richTextBox1.Enabled = true;

richTextBox1.Text = "";

richTextBox1.Focus();

}


{

if (openFileDialog1.ShowDialog() != DialogResult.Cancel)

{

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richTextBox1.LoadFile(openFileDialog1.FileName,

RichTextBoxStreamType.PlainText); } }


{

if (saveFileDialog1.ShowDialog() != DialogResult.Cancel)

{

richTextBox1.SaveFile(saveFileDialog1.FileName,

RichTextBoxStreamType.PlainText); } }


{

if (colorDialog1.ShowDialog() != DialogResult.Cancel)

{

richTextBox1.SelectionColor = colorDialog1.Color; } }


{

if (fontDialog1.ShowDialog() != DialogResult.Cancel)

{

richTextBox1.SelectionFont = fontDialog1.Font; } }

private void Form1_Load(object sender, EventArgs e)

{

richTextBox1.Enabled = false; }

private void button6_Click(object sender, EventArgs e) {

this.Close(); } } }

SCREEN OUTPUT:

Screen shot of SaveFileDialog control to save the Content of Rich text Box to a file

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Screen shot of OpenFileDialog control to open the file

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Screen shot of FontDialogBox to apply the font settings

RESULT

Thus the above application Active-x control has been executed successfully.

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AIM

To Develop a Component for Currency Conversion using .NET

ALGORITHM

Step 1: Start the program.

Step 2: Goto Start -> All Programs -> MicrosoftVisualStudio 2005.

Step 3: In the start page select File -> NewProject.

Step 4: Select the desired language and Select the template as WindowsApplication.

Give the FileName and Location.

Step 5: In the Design view create the Form with the fileds for

Entering the amount,

Displaying the rupees equivalent,

Three Buttons: Calculate, Clear, Exit,

Four RadioButtons: US Doller, Pound, Euro, Dinar.

Step 6: Run the program using F5.

Step 7: Stop the Program.

FORM DESIGN

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Ex No: 7

Date: 12/08/11CURRENCY CONVERSION

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SOURCE CODE

using System;



using System.Data;


using System.Text;


namespace CurrencyConversion

{ public partial class Form1 : Form

{ public Form1()

{ InitializeComponent(); }

// CODE CORRESPONDING TO CALCULATE BUTTON


{

Double tot = 0;

Double a = Double.Parse(textBox1.Text);

if (radioButton1.Checked == true)

tot = a * 45.05;

else if (radioButton2.Checked == true)

tot = a * 71.31;

else if (radioButton3.Checked == true)

tot = a * 60.66;

else

tot = a * 119.47;

textBox2.Text = tot.ToString("0.000"); }

// CODE CORRESPONDING TO CLEARBUTTON


{

textBox1.Text = " ";

textBox2.Text = " ";

radioButton1.Checked = true;

textBox1.Focus(); }

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// CODE CORRESPONDING TO EXIT BUTTON


{ Application.Exit(); } } }

SCREEN OUTPUT

RESULT

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Thus the above application Currency Conversion using .NET was executed

successfully.

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AIM:

To develop a component for encryption and Decryption using COM / .NET

ALGORITHM:

Step 1: Goto Start->All Programs->Microsoft Visual Studio.

Step 2: In the start page File->New Project select the desired language and select the

template as Windows Application by selecting Visual C#, Give the filename and

location.

Step 3: In design Place the label, textbox, buttons for appropriate operations.

Step 4: In Button click event,For Encrypt convert the given string to integer(ASCII

values),add 100 with each character and then add the specified length as first letter.

Step 5: For Decrypt get the string, take first char as splitting length, using this find the

no of character and then subtract with 100 for find the original string.

FORM DESIGN:

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Ex No: 8

Date: 27/08/11ENCRYPTION AND DECRYPTION

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SOURCE CODE:

using System; //Import the necessary library files



using System.Data;


using System.Text;


namespace encryption //Name space encryption provides working environment

{

public partial class Form1 : Form //Define the class which inherits the Form class

{

string res,receiver;

string a;

int[] t = new int[100];

public Form1() //Constructor for the class Form1

{

InitializeComponent(); //Initialize all the components

}


{

//Code for Encrypting

if (button1.Text == "Encrypt")

{

label1.Text = "Encrypted Text"; //change the label text and button text

button1.Text = "Decrpt";

a = textBox1.Text;

for (int j = 0; j < 100; j++) //separate the letters to int

t[j] = 0;

res = "";

for (int i = 0; i < a.Length; i++) //Convert to ASCII value and add 100

{

t[i] = Convert.ToInt32(a[i]);

t[i] = t[i] + 100; //add 100 with separated Integer

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res = res + Convert.ToString(t[i]);

}

textBox1.Text = "3"+res; //Specify the spliting length

receiver = "3"+res;

} else {

label1.Text = "The Result is";

button1.Text = "Encrypt";

textBox1.Text = ""; //Find the legth and size

char size = receiver[0],solution;

string x = Convert.ToString(size);

int orgsize = Convert.ToInt32(x);

int num = 0, org, l = 1;

int size1 = receiver.Length, length = size1 / orgsize, o = orgsize + 1;

//To convert the original string

for (int i = 0; i < length; i++)

{

string textt = "";

for (int j =l; j < o ; j++)

{

textt = textt + Convert.ToChar(receiver[j]); //separate the text and convert to

original letter

}

num = Convert.ToInt32(textt); //Read the numbers

org = num - 100;

solution = Convert.ToChar(org); //concatenate the string

textBox1.Text = textBox1.Text + Convert.ToString(solution);

o += orgsize;

l += orgsize; } } } } }

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SCREEN OUTPUT

Screen Shot1

Screen Shot 2

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AIM:

To develop a component to retrieving the information from Message Box using

COM / .NET

ALGORITHM

Step 1: Start the process.

Step 2: Place the controls in form look like given below.

Step 3: Double click on the command button Information and enter the following codes.


{

MessageBox.Show("Hi! friends", "Information", MessageBoxButtons.OK,

MessageBoxIcon.Information); }

Step 5: Double click on the command button Question and enter the following codes.


{

dr = MessageBox.Show("Do you wanna continue?", "Question",

MessageBoxButtons.YesNo, MessageBoxIcon.Question);

if (dr == DialogResult.Yes)

MessageBox.Show("Yes! you can continue your work", "Yes",

MessageBoxButtons.OK, MessageBoxIcon.Information);

else

MessageBox.Show("Thanks for being with us", "No", MessageBoxButtons.OK,

MessageBoxIcon.Information); }Step 6: Double click on the command button Exclamination and enter the following

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Ex No:9

Date: 15/09/11RETERVING INFORMATION FROM MESSAGE BOX

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Codes.


{

MessageBox.Show("Wow! wat a nice picture", "Exclamation",

MessageBoxButtons.OK, MessageBoxIcon.Exclamation); }

Step 7: Double click on the command button Warning and enter the following codes.


{

dr = MessageBox.Show("Your system is infected by Virus!", "Warning",

MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Warning);

if (dr == DialogResult.Retry)

MessageBox.Show("You lose unsaved document", "Abort", MessageBoxButtons.OK,

MessageBoxIcon.Information);

else if (dr == DialogResult.Abort)

MessageBox.Show("Oops! your system is attacked severly!", "Abort",

MessageBoxButtons.OK, MessageBoxIcon.Information);

else

MessageBox.Show("Your System is stillaffected!","Ignore",MessageBoxButtons.OK,MessageBoxIcon.Information); }

Step 8: Double click on the command button Error and enter the following codes.


{

MessageBox.Show("Error in the Program", "Error", MessageBoxButtons.OK,

MessageBoxIcon.Error); }

Step 9: Double click on the command button Stop and enter the following codes.


{

dr = MessageBox.Show("Save and close all the documents", "Stop",

MessageBoxButtons.YesNoCancel, MessageBoxIcon.Stop);

if (dr == DialogResult.Yes)

MessageBox.Show("Document is saved successfully", "Yes", MessageBoxButtons.OK,

MessageBoxIcon.Information);

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Screen shot-3

RESULT

Thus the above application Retrieving information from message Box has

been executed successfully.

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Ex No: 10

Date: 23/09/11STOCK MARKET EXCHANGE INFORMATION

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AIM:

Develop a middleware component for retrieving Stock Market Exchange

information using CORBA.

ALGORITHM:

STEP 1: Start the process.

STEP 2: Create the IDL file and save it as stock.idl

i) Declare the CORBA IDL module.

ii) Declare the interface

iii) Declare the operations and

iv) Mapping the IDL to java

STEP 3: Create the server method and save it as StockServer.java

STEP 4: Create the client method and save it as StockClient..java

STEP 5: Compile the StockServer and StockClient as

javac StockServer.java StockApp/*.java

javac StockClient.java StockApp/*.java

STEP 6: Execute the Stock market Application as following below.

i) Start orbdstart orbd ORBInitialPort 1050 ORBInitialHost localhost

ii) Run the StockServer by using

start java StockServer ORBInitialPort 1050 ORBInitialHost

localhost

iii) Run the StockClient by using

start java StockClient ORBInitialPort 1050 ORBInitialHost

localhost

STEP 7: Stop the process.

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w.setORB(orb);

//get object reference from the servant

org.omg.CORBA.Object ref=rootpoa.servant_to_reference(w);

Stock href=StockHelper.narrow(ref);

//get the root naming context

org.omg.CORBA.Object objRef=orb.resolve_initial_references("NameService");

NamingContextExt ncRef=NamingContextExtHelper.narrow(objRef);

//bind the object reference in naming

String name="p1";

NameComponent path[]=ncRef.to_name(name);

ncRef.rebind(path,href);

System.out.println("Server Ready and Waiting ");

//Wait for invocations from clients.

orb.run(); }

catch(Exception e)

{

System.out.println("Error occur"+e);

e.printStackTrace(System.out); } } }

//Client program named as StockClient.java

import StockApp.*;

import org.omg.CosNaming.*;

import org.omg.CosNaming.NamingContextPackage.*;

import org.omg.CORBA.*;

import java.io.*;

public class StockClient {

static Stock k;

public static void main(String arg[]) {

String[ ] uid={"M120","p1190","M890","K345"};

String[ ] p={"Hutch","Infosys","Wipro","Cognizant"};

double[ ] unit={5,6,5,6};

double[ ] noshares={10,4,7,3};

double[ ] total={0,0,0,0};

int ch;

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try {

//create and initialize the ORB

ORB orb=ORB.init(arg,null);

//get the root naming context

org.omg.CORBA.Object

objRef=orb.resolve_initial_references("NameService");

//use NamingContextExt instead of NamingContext.This is the part of the

interoperable naming service.

NamingContextExt ncRef=NamingContextExtHelper.narrow(objRef);

//resolve the object reference in naming

String name="p1";

k=StockHelper.narrow(ncRef.resolve_str(name));

for(int i=0;i

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System.out.println("Enter your BuyerId:");

String bid=k1.readLine();

System.out.println("Enter company Name");

String co=k1.readLine();

System.out.println("No.of share you want to buy:");

double sh=Double.parseDouble(k1.readLine());

System.out.println("Enter Seller id:");

String sid=k1.readLine();

for(int i=0;i

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if(uid[i].equals(bid1)) {

if(p[i].equals(co1)) {

noshares[i]-=sh1;

total[i]=unit[i]*noshares[i]; } } }

break;

case 3:

System.out.println("\t\tSTATUS OF NSE");

System.out.println("\t--------------------------------------------------------");

System.out.println("\tUid\tCompanyName\tUnit\tNoofShares\tTotal");

System.out.println("\t--------------------------------------------------------");

for(int i=0;i

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Menu Options

1. Buy

2. Sell

3. Display

Enter your choice: 1

Enter your Buyer Id: M124

Enter Company Name: Hutch

No. of share you want to Buy: 5

Enter Seller Id: 123

Do you want to continue(y/n): y

Menu Options

1. Buy

2. Sell

3. Display

Enter your choice: 3

STATUS OF NSE

-----------------------------------------------------------------------------

Uid Company Name Unit No of shares total

-----------------------------------------------------------------------------

M124 Hutch 5.0 15.0 75.0

P1190 Infosys 6.0 4.0 24.0

M890 Hutch 5.0 7.0 35.0

K345 Infosys 6.0 3.0 18.0

Do you want to continue(y/n): n

RESULT

Thus the above application Stock Exchange Information using CORBA has

been executed successfully.

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SOURCE CODE:

//IDL INTERFACE

module WeatherApp {

interface Weather {

void adjusttemp(in double r);

double getcurrent();

double getMax();

double getMin();

void call(in double k);

oneway void shutdown(); }; };

//CLIENT PROGRAM

import WeatherApp.*;

import org.omg.CosNaming.*;

import org.omg.CosNaming.NamingContextPackage.*;

import org.omg.CORBA.*;

public class WeatherClient {

static Weather wt;

public static void main(String args[]) {

double[][] wr={{-1.5,2.5,4.2,-4.5},{-2.3,-7.8,6.2,-4.7},{4.3,-3.6,5.9,-1.7}};

String[] wc={"Chennai","Mumbai","Delhi","Calcutta"};

int i,j;

try {

ORB w=ORB.init(args,null);

org.omg.CORBA.Object

wf=w.resolve_initial_references("NameService");

NamingContextExt ncref=NamingContextExtHelper.narrow(wf);

String name="Weather";

wt=WeatherHelper.narrow(ncref.resolve_str(name));

System.out.println("Obtained Handle on Object Server"+wt);

System.out.println("\t WEATHER FORECASTING");

System.out.println("\t***********************");

wt.call(20.0);

for(i=0;i

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System.out.println(wc[i]);

System.out.println("*******************");

for(j=0;jMax) {

Max=current; }

else if(current

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{ return current; }

public void call(double f)

{ Min=Max=current=f; }

public void shutdown()

{ w.shutdown(false); } }

public class WeatherServer {

public static void main(String args[]) {

try {

ORB w=ORB.init(args,null);

POA wpoa=POAHelper.narrow(w.resolve_initial_references("RootPOA"));

wpoa.the_POAManager().activate();

WeatherImp w1=new WeatherImp();

w1.setORB(w);

org.omg.CORBA.Object ref1=wpoa.servant_to_reference(w1);

Weather wref=WeatherHelper.narrow(ref1);

org.omg.CORBA.Object wf=w.resolve_initial_references("NameService");

NamingContextExt ncref=NamingContextExtHelper.narrow(wf);

String name="Weather";

NameComponent path[]=ncref.to_name(name);

ncref.rebind(path,wref);

System.out.println("SERVER READY AND WAITING!!");

w.run();

}

catch(Exception e)

{

System.out.println(e);

}

}

}

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SCREENOUTPUT:

E:\Weather>idlj Weather.idl

E:\Weather>idlj fall Weather.idl

E:\Weather>cd WeatherApp

E:\Weather\WeatherApp>javac *.java

Server:

E:\Weather>javac Weather_ser.java

E:\Weather>java Weather_ser

Hello!!! SERVER READY AND WAITING!!

E:\Weather>

Client:

E:\Weather>javac Weather_clnt.java

E:\Weather>java Weather_clnt

Obtained Handle on Object

Server IOR:000000000000001b49444c3a57656174686572417070

2f576561746865723a312e300000000000010000000000000086000102000000000d313

9322e3136 382e362e3430000005d500000031afabcb0000000020909d99 c400000001000000000000000100000008526f6f74504f41000000000800000001000000000

a000000000000020000000100000020000000000001000100000002050100010001002

000010109000000010001010000000026000000020002

WEATHER FORECASTING

***********************

Chennai

*******************

Max Temp: 25.0

Min Temp: 18.0

Current Temp: 21.0

Mumbai

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*******************

Max Temp: 25.0

Min Temp: 11.0

Current Temp: 12.0

Delhi

*******************

Max Temp: 25.0

Min Temp: 11.0

Current Temp: 17.0

E:\Weather>

mwt record 2011-2012

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