Goutham Raam (1)

8/3/2019 Goutham Raam (1)

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WEB TECHNOLOGY RECORD

Name :- S. GOUTHAM RAAM

Roll No :- 2009115031

Class :- IT-G BATCH

Exercises Signature

APPLETS-I

6.1 Shapes in Applet

6.2 Parameter Passing

6.3 Smiley

APPLETS-II

7.1 Message Display

7.2 Rectangle (Parameter passing)

7.3 Scrolling Text

NETWORKING CLASSES

8.1 URL Class

8.2 InetAddress Class

8.3 URLConnection Class

8.4 Chat Program

UDP PROTOCOL

9.1 File Sharing

REMOTE METHOD INVOCATION

10.1 Calculator

10.2 File Transfer


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APPLETS

6.1 Shapes using applets

AIM :

To draw simple shapes in applet window.

CODING :

import java.awt.*;

import java.applet.*;

/*

*/

public class Shapes extends Applet

{

public void init()

{

repaint();

}

public void paint(Graphics g)

{

//Rectangle inside Oval

g.drawOval(25,75,40,40);


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g.drawRect(20,70,50,50);

//Oval inside Rectangle

g.drawOval(80,70,50,50);

g.drawRect(90,80,30,30);

//Cube

g.drawRect(50,150,70,70);

g.drawRect(20,180,70,70);

g.drawLine(20,180,50,150);

g.drawLine(20+70,180,50+70,150);

g.drawLine(20,180+70,50,150+70);

g.drawLine(20+70,180+70,50+70,150+70);

//Cone

g.drawOval(150,75,50,20);

g.drawLine(150,85,175,125);

g.drawLine(175,125,200,85);

}

}

OUTPUT :


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6.2 Parameter Passing

AIM :

To write a simple program to demonstrate Parameter

passing from HTML code to an applet code.

CODING :


import java.awt.*;

/*

*/

public class ParamDemo extends Applet

{

String s;


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public void init()

{

s=getParameter("str");

if(s==null)

s="Java";

}


{

g.drawString("Hai " + s,50,50);

}

}

OUTPUT :

Hello WebTech

6.3 SMILEY

AIM :

To draw Smiley in the applet window.

CODING :


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import java.awt.*;


/*

*/

public class Smiley extends Applet

{

public void init()

{

setBackground(Color.white);

}


{

g.drawString("I am Smiling",100,90);

g.setColor(Color.yellow);

g.fillOval(100,100,500,500);

g.setColor(Color.black);

g.fillOval(230,230,30,30);

g.fillOval(420,230,30,30);

g.fillArc(235,400,220,120,0,-180);

g.setColor(Color.white);

g.fillOval(700,100,500,500);

g.setColor(Color.black);

g.fillOval(830,230,30,30);


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g.fillOval(1020,230,30,30);

g.fillArc(850,450,200,120,0,180);

}

}

OUTPUT :


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APPLETS - II

7.1 Message Display

AIM :

To display a message at the centre of the applet window

which is passed as a parameter to the code.

CODING :


import java.awt.*;

/*

*/

public class demoapp extends Applet

{


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{

String s;

s=getParameter("str");

g.drawString(s,246,250);

}

}

OUTPUT :

Anandh

7.2 Rectangle (Parameter Passing)

AIM :

To draw a rectangle in an applet filled with red color. The

dimensions and starting point of the rectangle should be

accepted from the HTML file. If no dimensions are given, draw

the rectangle having a width of 250 and height of 150 at 10, 10

positions.

CODING :


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import java.awt.*;

/*

*/

public class RectDemo extends Applet

{

public void init()

{

setBackground(Color.black);

setForeground(Color.cyan);

}


{

int a,b,c,d;

String p,q,r,s;

p=getParameter("x");

q=getParameter("y");

r=getParameter("l");


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s=getParameter("b");

if(p==null || q==null || r==null || s==null)

g.fillRect(10,10,250,100);

else

{

a=Integer.parseInt(getParameter("x"));

b=Integer.parseInt(getParameter("y"));

c=Integer.parseInt(getParameter("l"));

d=Integer.parseInt(getParameter("b"));

g.fillRect(a,b,c,d);

}

}

}

OUTPUT :


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7.3 Scrolling Text

AIM :

To display a text in the applet window which scrolls

horizontally to and fro along the window

CODING :

import java.awt.*;


/*

*/

public class ex extends Applet implements Runnable

{

int i=350;

boolean v=false;


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Thread t;

public void init()

{


setForeground(Color.pink);

t=new Thread(this);

t.start();

}

public void run()

{

for(;;)

{

repaint();

}

}


{

g.drawString(Scrolling Text,i,50);

try

{

Thread.sleep(20);

}

catch(InterruptedException e)

{


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System.out.println(e);

}

if(!v)

i--;

if(v)

i++;

if(i==690-s.length())

v=false;

if(i==0)

v=true;

}

}

OUTPUT :


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NETWORK PROGRAMMING

8.1 URL Class

AIM :

To write a Java program which demonstrates the URL

class.

CODING :

import java.io.*;

import java.net.*;

public class URLDemo

{

public static void main(String args[]) throws Exception

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{

URL u = new

URL("http://www.gmail.com:80/java/books/tutotial/#down");

System.out.println("Protocol : " + u.getProtocol());

System.out.println("Port : " + u.getPort());

System.out.println("File : " + u.getFile());

System.out.println("Reference: " + u.getRef());

System.out.println("Host : " + u.getHost());

}

}

OUTPUT :

Protocol : http

Port : 80

File : /java/books/tutotial/

Reference: down

Host : www.gmail.com

8.2 InetAddress Class


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AIM :

To write a Java program which demonstrates the

InetAddress class.

CODING :

import java.net.*;

import java.io.*;

public class InetDemo

{

public static void main(String args[])throws IOException

{

InetAddress addr=InetAddress.getLocalHost();

System.out.println("Inet Address : "+addr);

System.out.println("Host Address : "+addr.getHostAddress());

addr=InetAddress.getByName("120.32.23.6");

InetAddress ia[]=(InetAddress.getAllByName("255.1.2.42"));for(int i=0;i


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}

}

OUTPUT :

Inet Address : localhost/127.0.0.1

Host Address : 127.0.0.1

/255.1.0.8/10.7.8.2

8.3 URL Connection Class

AIM :

To write a Java program which demonstrates the

URLConnection class.

CODING :

import java.io.*;

import java.net.*;

import java.util.*;

class URLConnDemo

{


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public static void main(String args[])throws Exception

{

URL u=new URL("file:///C:/Java/Week 9/sample.html");

URLConnection uc=u.openConnection();

BufferedReader br = new BufferedReader(new

InputStreamReader

(uc.getInputStream()));

String str;

System.out.println("SOURCE CODE - \n");

while((str=br.readLine())!=null)

System.out.println(str);

System.out.println("\nContent type is - " +

uc.getContentType());

System.out.println("Content length is - " +

uc.getContentLength());

long d=uc.getDate();

if(d!=0)

System.out.println("Creation Date is:- " + new Date(d));

else

System.out.println("Creation Date information not

provided");

long e=uc.getExpiration();

if(e!=0)

System.out.println("Expiration Date is:- " + new Date(e));


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else

System.out.println("Expiration Date inforamtion not

provided");

long l=uc.getLastModified();

if(l!=0)

System.out.println("Last Modified Date is - " + new Date(l));

else

System.out.println("Last Modified Date information not

provided");

System.out.println();

}

}

OUTPUT:

Content type is - text/html

Content length is - 372

Creation Date information not provided

Expiration Date inforamtion not provided

Last Modified Date is - Tue Dec 14 15:02:00 IST 2010


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8.4 Chat Program

AIM :

To write a Java program for chatting between Server and

Client using socket.

CODING :

Server:-

import java.net.*;

import java.io.*;

public class Server2

{


{

ServerSocket Ser = new ServerSocket(55202);

System.out.println("Server is waiting for connection to be

accepted");

Socket s = Ser.accept();

System.out.println("Connection accepted");

BufferedReader fromsoc,fromkbd;

PrintStream tosoc;


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String line;

while(true)

{

fromsoc = new BufferedReader(new

InputStreamReader(s.getInputStream()));

line = fromsoc.readLine();

if(line.equals("exit"))

System.exit(0);

System.out.println("Client : " + line);

tosoc = new PrintStream(s.getOutputStream());

System.out.print("Server : ");

fromkbd = new BufferedReader(new

InputStreamReader(System.in));

line=fromkbd.readLine();

tosoc.println(line);

}

}

}

Client :-

import java.io.*;

import java.net.*;

public class Client2


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{


{

Socket s = new

Socket(InetAddress.getByName("localhost"),55202);


PrintStream tosoc;





String line;

System.out.println("Type 'exit' to terminate connection");

for(;;)

{

System.out.print("Client : ");

line = fromkbd.readLine();

if(line.equals("Exit"))

System.exit(0);


tosoc.println(line);

line = fromsoc.readLine();

System.out.println("Server : " + line);

}


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}

OUTPUT :

SERVER

Server is waiting for

connection to be accepted

Connection accepted

Client : hi

Server : hii

Client : busy??

Server : i am always vetti....

CLIENT

Type 'exit' to terminate

connection

Client : hi

Server : hii

Client : busy??

Server : i am always vetti

Client : exit


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UDP PROTOCOL

10.1 File Sharing Between Server & Client

AIM :

To write a Java program for file sharing between Server &

Client. Server has the directory in which the files are going to

be searched. And client mentions the file name to be accessed

and the files contents are transferred to client by server.

CODING :

Server:-

import java.net.*;

import java.io.*;

public class FileSer

{

public static void main(String args[])

{

BufferedReader fromsoc,fromfile;


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PrintStream tosoc;

FileInputStream fis;

ServerSocket server;

Socket s;

String name,line;

File obj,obj2;

try

{

server = new ServerSocket(6000);

System.out.println("Server is waiting");

s=server.accept();

System.out.println("Connection accepted");




obj = new File(args[0]);

if(obj.isDirectory())

{

String st[] = obj.list();

while(true)

{

name = fromsoc.readLine();


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if(name.equals("index"))

{

for(int i=0 ; i


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}

}

else

{

System.out.println("It is not a directory");

}

s.close();

server.close();

}

catch(Exception e) { }

}

}

Client:-

import java.net.*;

import java.io.*;

public class FileClient

{

public static void main(String args[])

{


PrintStream tofile,tosoc;

FileOutputStream fos;

Socket s;


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String cmd,line,ch;

try

{

s = new Socket(InetAddress.getByName("localhost"),6000);






while(true)

{

System.out.println("\nEnter the command : ");

cmd = fromkbd.readLine();

if(cmd.equals("index"))

{

tosoc.println(cmd);

System.out.println("\nThe files are :");

while(!(line = fromsoc.readLine()).equals("end"))

System.out.println(line);

}

else if(cmd.startsWith("get "))

{

tosoc.println(cmd.substring(4));

if((fromsoc.readLine()).equals("nofile"))


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{

System.out.println("\nIt is not a file");

break;

}

else

{

System.out.println("\nFILE:");

while(!(line=fromsoc.readLine()).equals("eof"))

System.out.println(line);

break;

}

}

else

{

System.out.println("\nWrong command");

}

}

s.close();

}

catch(Exception e) { }

}

}

OUTPUT :


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SERVER

Server is waiting

Connection accepted

CLIENT

Enter the command :

hi

Wrong command

Enter the command :

index

The files are :

File1.txt

File2.txt

Enter the command :

get File1.txt

FILE:

hi this is gouthamroshini


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REMOTE METHOD INVOCATION

10.1 CALCULATOR

AIM:-

To write a Java program for Simple Calculator using RMI

technique.

CODING:-

1) Interface -

import java.rmi.*;

public interface calcinter extends Remote

{public int add(int a,int b) throws RemoteException;

public int sub(int a,int b) throws RemoteException;

public int mul(int a,int b) throws RemoteException;

public float div(int a,int b) throws RemoteException;

}

2) Implementation

import java.rmi.*;

import java.rmi.server.*;

public class calcimpl extends UnicastRemoteObject implements


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calcinter

{

public calcimpl() throws RemoteException { }

public int add(int a,int b) throws RemoteException

{

return a+b;

}

public int sub(int a,int b) throws RemoteException

{

return a-b;

}

public int mul(int a,int b) throws RemoteException

{

return a*b;

}

public float div(int a,int b) throws RemoteException

{

return (float)a/(float)b;

}

}

3) Server

import java.rmi.*;


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import java.net.*;

public class calcserver

{


{

calcimpl obj=new calcimpl();

Naming.rebind("calcserver",obj);

}

}

4) Client

import java.rmi.*;

public class calcclient

{


{

calcinter

robj=(calcinter)Naming.lookup("rmi://localhost/calcserver");

int a=10,b=3;

System.out.println("Sum is " + robj.add(a,b));

System.out.println("Difference is " + robj.sub(a,b));

System.out.println("Product is " + robj.mul(a,b));

System.out.println("Quotient is " + robj.div(a,b));


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}

}

OUTPUT

Addition : 13

Difference : 7

Product : 30

Division : 3.333333

10.2 FILE TRANSFER

AIM:-

To write a Java program to download a file from a Remote

Machine.

CODING:-

1) Interface

import java.rmi.*;

public interface FileInterface extends Remote

{

public String download(String file) throws Exception;

}


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2) Implementation

import java.rmi.*;

import java.io.*;

import java.util.*;


public class FileImpl extends UnicastRemoteObject implements

FileInterface

{

public FileImpl() throws RemoteException { }

public String download(String name) throws Exception

{

String line;

File obj = new File(name);

if(!obj.isFile())

{

System.out.println("No such file exits...");

return null;

}

else

{

FileInputStream fis;

BufferedReader fromfile;

fis = new FileInputStream(obj);


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fromfile = new BufferedReader(new InputStreamReader(fis));

String str = new String();

while((line=fromfile.readLine())!=null)

{

str = str + " " + line;

}

return str;

}

}

}

3) Server

import java.rmi.*;

import java.net.*;

public class FileServer

{


{

FileImpl obj=new FileImpl();

Naming.rebind("FileServer",obj);

}

}


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4) Client

import java.rmi.*;

public class FileClient

{


{

FileInterface

robj=(FileInterface)Naming.lookup("rmi://localhost/FileServer")

;

String s=new String();

s=robj.download("hi.txt");

System.out.println(The files contents is - + \n);

System.out.println(s);

}

}

OUTPUT:-

File received . Contents :-

Hi this is goutham raam I am a pandu boy


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AWT & EVENT HANDLING

11.1 ADD & SUBTRACT

AIM:-

To create an applet with three TextFields and two buttons

Add and Subtract. User will enter two values in the TextFields.

When the button Add is pressed, the addition of the two values

should be displayed in the third TextField. Same the Subtract

button should perform the subtraction operation.

CODING:-

import java.awt.*;

import java.awt.event.*;


/*

*/

public class AritApp extends Applet implements ActionListener

{

TextField tf1,tf2,tf3;

Button b1,b2;

public void start()

{

tf1=new TextField();


add(tf1);

add(tf2);

b1=new Button("Add");

b2=new Button("Subtract");

b1.addActionListener(this);

b2.addActionListener(this);add(b1);


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add(b2);


add(tf3);

}

public void actionPerformed(ActionEvent ae)

{

String s=ae.getActionCommand();

int n1,n2;

n1=Integer.parseInt(tf1.getText());

n2=Integer.parseInt(tf2.getText());

if(s.equals("Add"))

tf3.setText(Integer.toString(n1+n2));else if(s.equals("Subtract"))

tf3.setText(Integer.toString(n1-n2));

}

}

OUTPUT:-


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11.2 TABLE

AIM:-

To create an applet/application with TextField, a Button

and a Listbox. User has to enter a number in the TextField.

When user clicks on the button, the arithmetic table for thatnumber should be displayed in the ListBox. If the user repeats

this process the ListBox should be cleared and refilled by the

latest values.

CODING:-


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import java.awt.*;

/*

*/

public class Table extends Applet implements ActionListener

{

TextField NumBox;

Button b1;

List disp;

public void start(){

NumBox=new TextField();

add(NumBox);

b1=new Button("Show Table");

add(b1);

disp = new List(10);

add(disp);


}


{

disp.removeAll();

String str=ae.getActionCommand();

int num,i;

int table[] = new int[11];num=Integer.parseInt(NumBox.getText());

for(i=1;i


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repaint();

}

}

OUTPUT:-


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11.3 MENU BAR COLOR & FONT

AIM:-

To develop an application with a Menu File and twomenuitems Color and Font. The submenu of the menuitem

Color will contain different colors which when selected should

change the background of the applet. The submenu of the

menuitem Font should contain the list of Fonts. Create a

TextField in the center of the container. When the font is

selected from the font list of menu, the TextField text should be

appeared in that font.

CODING:-


/*

*/

public class MenuBarDemo extends Applet implementsActionListener

{

Font f1,f2,f3;

TextField t=new TextField(20);

public void start()

{

Frame f=new Frame();

f.setVisible(true);f.setSize(300,300);

f.setTitle("Font & Color ");

add(t);

MenuBar mb=new MenuBar();

f.setMenuBar(mb);

Menu font=new Menu("Font");MenuItem font1=new MenuItem("Times New Roman");


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MenuItem font2=new MenuItem("Garamond");

MenuItem font3=new MenuItem("Arial");

font1.addActionListener(this);



font.add(font1);

font.add(font2);

font.add(font3);

Menu color=new Menu("Color");

MenuItem color1=new MenuItem("Black");

MenuItem color2=new MenuItem("Blue");

MenuItem color3=new MenuItem("Green");color1.addActionListener(this);

color2.addActionListener(this);

color3.addActionListener(this);

color.add(color1);

color.add(color2);

color.add(color3);

mb.add(font);

mb.add(color);

}


{

String st=ae.getActionCommand();

if(st.equals("Black"))


else if(st.equals("Blue"))setBackground(Color.blue);

else if(st.equals("Green"))

setBackground(Color.green);

if(st.equals("Times New Roman"))

{

f1=new Font("TimesNewRoman",Font.ITALIC,12);

t.setFont(f1);


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}

else if(st.equals("Garamond"))

{

f2=new Font("Garamond",Font.BOLD,12);

t.setFont(f2);

}

else if(st.equals("Arial"))

{

f3=new Font("Arial",Font.BOLD,12);

t.setFont(f3);

}

repaint();}

}

OUTPUT:-


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11.4 LOGIN SCREEN

AIM:-To develop an Login Screen GUI using appropriate layout

managers.

CODING:-


import java.awt.*;


/*

*/

public class LogDemo extends Applet

{

Label name,pass;

Button ok,can;TextField namet,passt;

public void start()

{

setLayout(new FlowLayout(FlowLayout.LEFT));

name=new Label("Login",Label.LEFT);

add(name);

namet=new TextField(20);

add(namet);pass=new Label("Password",Label.LEFT);

add(pass);

passt=new TextField(20);

add(passt);

passt.setEchoChar('*');

ok=new Button("OK");

add(ok);can=new Button("Cancel");


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add(can);

}

}

OUTPUT:-

11.5 CHECK BOX & RADIO BUTTONS

AIM:-

To develop a simple GUI screen with Checkboxes and

Radio buttons.

CODING:-

import java.awt.*;


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/*

*/

public class awt6 extends Applet

{

Label l1,l2,l3,l4,l5,l6;

TextField tf,tf2;

Checkbox c1,c2,c3,c4,c5,c6;

CheckboxGroup cgp;

public void start()

{

setLayout(new GridLayout(0,2));l1=new Label("Your Name:",Label.LEFT);

add(l1,FlowLayout.LEFT);

tf=new TextField(10);

add(tf);

l2=new Label("Your Class:");

add(l2);

l3=new Label("Your Hobbies:");

add(l3);

cgp=new CheckboxGroup();

c1=new Checkbox("FY",cgp,false);

c2=new Checkbox("SY",cgp,false);

c3=new Checkbox("TY",cgp,false);

c4=new Checkbox("Music",false);

c5=new Checkbox("Dance",false);

c6=new Checkbox("Sports",false);add(c1);

add(c4);

add(c2);

add(c5);

add(c3);

add(c6);

tf2=new TextField("Name:---, Class:---, Hobbies---",20);

add(tf2);


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}

}

OUTPUT:-

11.6 MENUS & SUB MENUS

AIM:-

To develop a Menu bar with Menu Items and Sub Items.


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CODING:-

import java.applet.*;import java.awt.*;

import javax.swing.*;


/*

*/

public class awt7

{public static void main(String args[])

{

Frame f=new Frame("Frame Menu");

f.setVisible(true);

f.setSize(500,500);

MenuBar mb=new MenuBar();

f.setMenuBar(mb);

Menu m=new Menu("File");

Menu n=new Menu("Edit");

Menu v=new Menu("View");

Menu m1=new Menu("New..");

MenuItem m2=new MenuItem("Open");

MenuItem m3=new MenuItem("Save");

MenuItem m4=new MenuItem("Exit");

MenuItem m5=new MenuItem("Cut");MenuItem m6=new MenuItem("Paste");

MenuItem m7=new MenuItem("File");

MenuItem m8=new MenuItem("Folder");

Menu c1=new Menu("Ruler");

CheckboxMenuItem m9=new CheckboxMenuItem("Toolbars");

CheckboxMenuItem c2=new CheckboxMenuItem("Standard");

CheckboxMenuItem c3=new CheckboxMenuItem("Format");

CheckboxMenuItem c4=new CheckboxMenuItem("Drawing");


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m1.add(m7);

m1.add(m8);

m.add(m1);

m.add(m2);

m.add(m3);

m.addSeparator();

m.add(m4);

n.add(m5);

n.add(m6);

c1.add(c2);

c1.add(c3);

c1.add(c4);v.add(c1);

v.add(m9);

v.add(new CheckboxMenuItem("Drawing",false));

mb.add(m);

mb.add(n);

mb.add(v);

}

}

OUTPUT:-


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11.7 FIND & REPLACE

AIM:-

To write a Java program to design a screen containing

four text fields. First for the text, second for what to find andthird for replace. Display result in the fourth text field. Also

display the count of total no. of occurrences. The button clear

to clear the text boxes.

CODING:-

import java.applet.*;import java.awt.*;


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import java.util.*;

/*

*/

public class FNR2 extends Applet implements ActionListener

{

Label l1,l2,l3,l4;

Button b1,b2,b3;

TextField t1,t2,t3,t4,t5,t6;

public void start()

{

setLayout(new FlowLayout(FlowLayout.LEFT));t1=new TextField(" Find and Replace",35);

add(t1);

l1=new Label("Enter Text",Label.LEFT);

add(l1,FlowLayout.CENTER);

t2=new TextField(30);

add(t2);

l2=new Label("Text To Find",Label.LEFT);

add(l2);


add(t3);

l3=new Label("Text To Replace",Label.LEFT);

add(l3);


add(t4);

l4=new Label("No.of Occurences",Label.LEFT);add(l4);


add(t5);


add(t6);

b1=new Button("FIND");

add(b1);

b2=new Button("REPLACE");


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add(b2);

b3=new Button("CLEAR");

add(b3);

t2.addActionListener(this);








}public void actionPerformed(ActionEvent ae)

{

int c=0;


String m=t2.getText();

String n=t3.getText();

String r=t4.getText();

StringTokenizer s=new StringTokenizer(m);

String mm;

String p=new String();

if(st.equals("FIND"))

{

if(m!=null)

{

while(s.hasMoreTokens()){

mm=s.nextToken();

if(n.equals(mm))

{

c++;

}

}

}


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t5.setText(Integer.toString(c));

}

if(st.equals("REPLACE"))

{

if(m!=null)

{

while(s.hasMoreTokens())

{

mm=s.nextToken();

if(n.equals(mm))

{

p=p+r;p=p+" ";

}

else

{

p=p+mm;

p=p+" ";

}

}

}

t6.setText(p);

}

if(st.equals("CLEAR"))

{

t2.setText("");

t3.setText("");t4.setText("");

t5.setText("");

t6.setText("");

}

repaint();

}

}


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OUTPUT:-


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SWINGS12.1. LOGIN SCREEN

AIM:-

Create a login form which contains a user id, password

field and two buttons, submit and reset. If the user id and

password field is left blank, then on click of submit button,

show a message to the user to fill in the fields. On click of reset

button, clear the fields.

CODE:-

import java.awt.*;




/*

*/

public class JDemo1 extends JApplet implements ActionListener

{

JTextField id;

JPasswordField pw;

JLabel pass,userid;


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JButton s,r;

public void start()

{

setLayout(new GridLayout(0,2));

userid=new JLabel("UserID : ");

id=new JTextField(20);

pass=new JLabel("Password : ");

pw=new JPasswordField(20);

pw.setEchoChar('*');

s= new JButton("Submit");

r= new JButton("Reset");

s.addActionListener(this);

r.addActionListener(this);

add(userid);

add(id);

add(pass);

add(pw);

add(s);

add(r);

}


{


if(st.equals("Submit"))


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{

JOptionPane jp=new JOptionPane();

if( (id.getText().equals("")) || (pw.getText().equals("")) )

{

jp.showMessageDialog(null,"Empty

Fields","",JOptionPane.INFORMATION_MESSAGE);

}

}

if(st.equals("Reset"))

{

id.setText("");

pw.setText("");

}

repaint();

}

}


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OUTPUT:-

12.2 COPYING LIST

AIM:-

To create two lists using JList class with a button. On click

of that button, all selected items in one list are copied to the

other list.


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CODE:-

import java.awt.*;




/*

*/

public class JDemo2 extends JApplet implements ActionListener{

JList list1,list2;

JButton copy;

String a[]={"One","Two","Three","Four"};

public void start(){


list1=new JList(a);

add(list1);

copy=new JButton("Copy");

add(copy);

copy.addActionListener(this);

list2=new JList();

add(list2);

}


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{

if(ae.getActionCommand().equals("Copy"))

{

Object o[]=list1.getSelectedValues();

String b[]=new String[o.length];

for(int i=0;i


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12.3. TABBED PANE

AIM:-

To create a tabbed pane and place Login Screen in first

pane and CopyList screen in second pane.

CODE:-

import java.awt.*;




/*

*/

public class JDemo3 extends JApplet

{

public void init()

{

JTabbedPane jtp=new JTabbedPane();

jtp.addTab("Login",new LoginPanel());

jtp.addTab("Tabs",new TabsPanel());

add(jtp);

}


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}

class LoginPanel extends JPanel implements ActionListener

{

JTextField id;

JPasswordField pw;

JLabel pass,userid;

JButton s,r;

public LoginPanel()

{

setLayout(new FlowLayout(FlowLayout.LEFT,100,100));

userid=new JLabel("UserID : ");

id=new JTextField(20);

pass=new JLabel("Password : ");

pw=new JPasswordField(20);

pw.setEchoChar('*');

s= new JButton("Submit");

r= new JButton("Reset");

s.addActionListener(this);

r.addActionListener(this);

add(userid);

add(id);

add(pass);

add(pw);

add(s);


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add(r);

}


{


if(st.equals("Submit"))

{

JOptionPane jp=new JOptionPane();

if( (id.getText().equals("")) || (pw.getText().equals("")) )

{

jp.showMessageDialog(null,"Empty

Fields","",JOptionPane.INFORMATION_MESSAGE);

}

}

if(st.equals("Reset"))

{

id.setText("");

pw.setText("");

}

repaint();

}

}

class TabsPanel extends JPanel implements ActionListener


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{

JList list1,list2;

JButton copy;

String a[]={"One","Two","Three","Four"};

public TabsPanel()

{


list1=new JList(a);

add(list1);

copy=new JButton("Copy");

add(copy);

copy.addActionListener(this);

list2=new JList();

add(list2);

}


{

if(ae.getActionCommand().equals("Copy"))

{

Object o[]=list1.getSelectedValues();

String b[]=new String[o.length];

for(int i=0;i


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}

list2.setListData(b);

}

repaint();

}

}

OUTPUT:-


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SWINGS & RMI

13.1. CALCULATOR

AIM:-

To design a Simple Calculator using swings and RMI.

CODE:-

1) Interface-

import java.rmi.*;

public interface inter extends Remote

{

public int add(int a,int b) throws RemoteException;

public int sub(int a,int b) throws RemoteException;

public int mul(int a,int b) throws RemoteException;

public double div(int a,int b) throws RemoteException;

}

2) Implementation-

import java.rmi.*;



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public class impl extends UnicastRemoteObject implements

inter

{

public void impl() throws RemoteException { }

public int add(int a,int b) throws RemoteException

{

return (a+b);

}

public int sub(int a,int b) throws RemoteException

{

return (a-b);

}

public int mul(int a,int b) throws RemoteException

{

return (a*b);

}

public double div(int a,int b) throws RemoteException

{

return ((double)a/(double)b);

}

}


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3) Server

import java.rmi.*;

import java.net.*;

public class server

{


{

impl implobj=new impl();

Naming.rebind("CALC",implobj);

}

}

4) Client

import java.awt.*;


import java.rmi.*;

public class Client1 extends Frame implements ActionListener

{

Button b1,b2,b3,b4;

TextField t1,t2,t3;

Label l1,l2,l3;

inter obj;

public Client1() throws Exception

{


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obj=(inter)Naming.lookup("rmi://localhost/CALC");

setLayout(new FlowLayout());

l1=new Label("number 1");

add(l1);


add(t1);

l2=new Label("number 2");

add(l2);


add(t2);

l3=new Label("answer");

add(l3);


add(t3);

b1=new Button("Add");

add(b1);

b2=new Button("SUb");

add(b2);

b3=new Button("MUl");

add(b3);

b4=new Button("Div");

add(b4);




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}


{

try

{

int a,b;

a=Integer.parseInt(t1.getText());

b=Integer.parseInt(t2.getText());

String s;

if(ae.getSource()==b1)

{

s=Integer.toString(obj.add(a,b));

t3.setText(s);

}


{

s=Integer.toString(obj.sub(a,b));

t3.setText(s);

}


{

s=Integer.toString(obj.mul(a,b));


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t3.setText(s);

}


{

s=Double.toString(obj.div(a,b));

t3.setText(s);

}

}

catch(Exception e) {}

}


{

Client1 c=new Client1();

c.setVisible(true);

}

}

OUTPUT:-


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