Java

Re: How do i go about this

15-May-11 22:20

0. If you study Sums 101, you'll know all lists start at item 0.
1. On the intar-web, all capitals LIKE THIS is considered shouting, don't do it.
2. In general good grammar is rewarded, and lack of proper punctuation or capitals allows us to feed you to our pet Dalek.
3. If you do the maths on paper, the code should be easy.
4. Don't drink whiskey before you've had breakfast.

Panic, Chaos, Destruction.
My work here is done.

or "Drink. Get drunk. Fall over." - P O'H

OK, I will win to day or my name isn't Ethel Crudacre! - DD Ethel Crudacre

Have a bit more patience with newbies. Of course some of them act dumb -- they're often *students*, for heaven's sake. -- (Terry Pratchett, alt.fan.pratchett)

jschell16-May-11 8:46

how to make a listener to receive from HttpConnection

16-May-11 8:46

Are you learning math, programming or both?

And towards that do you understand the following math?
1. How to describe a line in a coordinate system?
2. How to find the intersection (or not) of two such lines.

williamroma13-May-11 1:40

Re: how to make a listener to receive from HttpConnection

13-May-11 1:40

7 close hi how are you today
<b>(SORRY FOR MY BAD ENGLISH)</b>

i want to sent data from Server to J2ME (using Java)

but i don't know when the server will send the data to my midlet

so how can i built a listener in midlet that listen to the resposne from server by (sure that response will receive using HTPPCOnnection)

plz help me , i need the solution
and tyvm.

jschell13-May-11 8:57

Re: how to make a listener to receive from HttpConnection

13-May-11 8:57

IP traffic is based on two ends of the communication chain.

TCP is built on IP.

TCP has a 'client' and a 'server'. The client connects to the server (this has nothing to do with what the applications that contain the functionality are named.)

HTTP is built on TCP.

So in answer to your question.
1. You must have a 'server' that handled HTTP.
2. You then create a 'client' which sends HTTP requests to the 'server'.

You can't do anything unless you have both parts.

The server cannot be transitory. It must basically be up all the time. In other words it cannot come into existence only once a client sends a request.

williamroma13-May-11 9:08

Re: how to make a listener to receive from HttpConnection

13-May-11 9:08

ty but..
how can i take the ip of an mobile
and what is the ip of the local host

and if you have any code example to deal with it
tyvm

jschell13-May-11 12:19

Re: how to make a listener to receive from HttpConnection

13-May-11 12:19

williamroma wrote:
how can i take the ip of an mobile

Why?

If you want the mobile to act as a client (and you can use sockets) then your question is meaningless.

If you want the mobile to act as a server then you must have an IP that is visible to the client. This however in general isn't what mobiles do but if it has the IP and sockets (which it would if it has an IP) then it is possible. Whether it is visible is a different issue.

Other than that you are asking a question about a specific mobile device because they are all different. It is pointless to ask how to do something on a mobile if it does not in fact have the minimum capability to support the solution. And whether it has Ip is not something that you determine with Java. Instead you look at the specification of the mobile itself.

williamroma13-May-11 12:39

Re: how to make a listener to receive from HttpConnection

13-May-11 12:39

ty 4 ur help

mabye i understand u
but i wana tell u all the problem

i want to make a chat program on Moblie
the program using emails on Hotmail

the chat include sending and receving IM

i can send the IM to my server then the server send it to the person (that i make chat with)

but with the person sends me a IM i can catch it in the server but how can i send it to the mobile
here is the problem cos i use HttpConnection
look:

the function
protected void doGet(HttpServletRequest request, HttpServletResponse response)

be in the server
i can send the IM from J2ME client to server and catch it in the request but when someone send the IM to the server how can i send it back to my J2ME client.
i know what i hv to use response but this object don't wait for the user to send data .. other words i dont know when the send the data to the server and so i do not know when i hv to send it to the client

plz help me , i have to make it , plz plz plz help me
tyvm

jschell13-May-11 12:55

Re: how to make a listener to receive from HttpConnection

13-May-11 12:55

williamroma wrote:
i have to make it

Why?

williamroma wrote:
but i wana tell u all the problem

And I already told you the most significant part of the problem. You must determine what the mobile can do.

That isn't a java question. It isn't a question you can answer about a "mobile". You need to ask it about a specific (vendor) mobile.

williamroma wrote:
the program using emails on Hotmail

That at least makes it likely that it can act as a client.

williamroma wrote:
plz help me

I suggest you write the code, client and server on a desktop first.

williamroma13-May-11 13:12

Re: how to make a listener to receive from HttpConnection

13-May-11 13:12

the code in Client j2me
i beggin received when i pressed

receivedChat

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package myPage;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

/**
*
* @author William
*/
public class Main extends MIDlet implements CommandListener {

//HTTPCONNECTION
// HttpConnection hc = null;
OutputStream out = null;
InputStream in = null;
String URL = "http://localhost:8080/DeleteWebApplication/RomaServlet";
//GUI IN J2ME
Display display = null;
Form mainScreem = null;
TextField emailTextfield = null;
TextField passwordTextfield = null;
Form contactScreem = null;
Command loginCommand = null;
Command getContactsCommand = null;
//ACCONT IN MSN
String sessionId;
//GUI FOR ERROR CONNECTION
Form errorScreem = null;
StringItem errorMessege = null;
Command back = null;
//MY ACCOUNT IN MSN
int numberOfContacts;
//GUI FOR CONTACTS FRIENDLYNAMES
Form ContactsList = null;
StringItem[] contactsListGui = null;
//GUI FOR CHAT WITH ONE CONTACTS
Form chatScreem = null;
Command backToContactsList = null;
Command sendIMToContact = null;

public Main() {
display = Display.getDisplay(this);
mainScreem = new Form("Welcome...");
emailTextfield = new TextField("Email", "", 100, TextField.ANY);
passwordTextfield = new TextField("Password", "", 100, TextField.PASSWORD);
contactScreem = new Form("Your Contacts are:");
loginCommand = new Command("login", Command.BACK, 1);
getContactsCommand = new Command("get commands", Command.OK, 2);
mainScreem.append(emailTextfield);
mainScreem.append(passwordTextfield);
mainScreem.addCommand(loginCommand);
mainScreem.addCommand(getContactsCommand);

errorScreem = new Form("ERROR");
errorMessege = new StringItem("", "Cann't Connection to " + URL);
back = new Command("back", Command.BACK, 1);
errorMessege.addCommand(back);
errorScreem.append(errorMessege);
errorScreem.setCommandListener(this);

mainScreem.setCommandListener(this);
display.setCurrent(mainScreem);
}

protected void destroyApp(boolean unconditional) throws MIDletStateChangeException {
}

protected void pauseApp() {
}

protected void startApp() throws MIDletStateChangeException {
}

public void commandAction(Command c, Displayable d) {
if (c == loginCommand) {
String email = emailTextfield.getString();
String password = passwordTextfield.getString();
try {
HttpConnection hc = (HttpConnection) Connector.open(URL);
if (sessionId != null) {
hc.setRequestProperty("cookie", sessionId);
}
emailTextfield.setString("totti_william88@hotmail.com");
passwordTextfield.setString("williamroma");
hc.setRequestProperty("type", 1 + "");
byte len = (byte) email.length();
out = hc.openOutputStream();
out.write(len);
byte[] emailBytes = email.getBytes();
byte[] passwordBytes = password.getBytes();
for (int i = 0; i < emailBytes.length; i++) {
out.write(emailBytes[i]);
}
for (int i = 0; i < passwordBytes.length; i++) {
out.write(passwordBytes[i]);
}
out.flush();
out.close();
in = hc.openInputStream();
String cookie = hc.getHeaderField("Set-cookie");
if (cookie != null) {
int semicoln = cookie.indexOf(";");
sessionId = cookie.substring(0, semicoln);
}
StringBuffer sb = new StringBuffer();
int cha;
while ((cha = in.read()) != -1) {
sb.append((char) cha);
}
in.close();
hc.close();
System.out.println(sb.toString());
} catch (IOException ex) {
display.setCurrent(errorScreem);
}
}
if (c == back && d == errorScreem) {
display.setCurrent(mainScreem);
}
if (c == getContactsCommand) {
try {
HttpConnection hc = (HttpConnection) Connector.open(URL);
hc.setRequestProperty("type", 2 + "");
if (sessionId != null) {
hc.setRequestProperty("cookie", sessionId);
}
in = hc.openInputStream();
int ch;
String data = "";
/*while((ch=in.read())!=-1){
data+=(char)ch;
}
System.out.println("Data received :"+data);*/
data += (char) in.read();
numberOfContacts = Integer.parseInt(data);
System.out.println("The Number Of Contacts You Have are :" + numberOfContacts);
List list = new List("Contacts...", Choice.IMPLICIT);
contactsListGui = new StringItem[numberOfContacts];
ContactsList = new Form("Contacts...");
for (int i = 0; i < numberOfContacts; i++) {
data = "";
char stop = 0;
ch = in.read();
stop = (char) ch;
while (stop != '_') {
data += (char) ch;
ch = in.read();
stop = (char) ch;
}
int LenOfContactFrindlyName = Integer.parseInt(data);
System.out.println(LenOfContactFrindlyName);
data = "";
for (int j = 0; j < LenOfContactFrindlyName; j++) {
ch = in.read();
data += (char) ch;
}
System.out.println(data);
contactsListGui[i] = new StringItem("", data);
list.append(data, null);
ContactsList.append(contactsListGui[i]);
}
//display.setCurrent(ContactsList);
list.setCommandListener(this);
list.addCommand(help);
display.setCurrent(list);
} catch (IOException ex) {
ex.printStackTrace();
}

}
if (c == help) {
chatScreem = new Form("WilliamRoma");
chatScreem.append(textToSend);
chatScreem.setCommandListener(this);
sendIMToContact = new Command("send", Command.BACK, 1);
chatScreem.addCommand(sendIMToContact);
chatScreem.addCommand(receivedChat);
display.setCurrent(chatScreem);
}
if (c == sendIMToContact) {
String dataToSend = textToSend.getString();
textToSend.setString("");
try {
HttpConnection hc = (HttpConnection) Connector.open(URL);
hc.setRequestProperty("type", 3 + "");
if (sessionId != null) {
hc.setRequestProperty("cookie", sessionId);
}
out = hc.openOutputStream();
byte b[] = dataToSend.getBytes();
for (int i = 0; i < b.length; i++) {
out.write(b[i]);
}
out.flush();
out.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
if (c == receivedChat) {
try {
HttpConnection hc = (HttpConnection) Connector.open(URL);
hc.setRequestProperty("type", 4 + "");
if (sessionId != null) {
hc.setRequestProperty("cookie", sessionId);
}

in = hc.openInputStream();
int ch;
String data = "";
while ((ch = in.read()) != -1) {
data += (char) ch;
}

textToSend.setString(data);

/*in = hc.openInputStream();
int ch;
String data = "";
while ((ch = in.read()) != -1) {
data += (char) ch;
}
textToSend.setString(data);*/
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
Command help = new Command("help", Command.BACK, 1);
TextField textToSend = new TextField("", "chat", 100, TextField.ANY);
Command receivedChat = new Command("receive", Command.CANCEL, 2);
}

williamroma13-May-11 13:13

Re: how to make a listener to receive from HttpConnection

13-May-11 13:13

this is the serverlet in the server

public class RomaServlet extends HttpServlet {
public void processRequest(HttpServletRequest request, HttpServletResponse response) throws IOException {
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}

@Override
public String getServletInfo() {
return "Short description";
}
MsnMessenger messenger = null;
BasicMessenger m = null;

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String type = request.getHeader("type");
System.out.println("my Type is :" + type);
if (type.equals("1")) {
HttpSession session = request.getSession(false);
int hits = 0;
BufferedReader br = request.getReader();
int len = br.read();//the length of Email ...
String email = "";
for (int i = 0; i < len; i++) {
email += (char) br.read();
}
String password = "";
int ch;
while ((ch = br.read()) != -1) {
password += (char) ch;
}
if (session == null) {
session = request.getSession(true);
session.setAttribute("Count", hits);
m = new BasicMessenger();
session.setAttribute("messenger", m);
Listener l = new Listener(session);
session.setAttribute("rere", "");
try {
m.start(messenger, email, password);
} catch (InstantiationException ex) {
Logger.getLogger(RomaServlet.class.getName()).log(Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
Logger.getLogger(RomaServlet.class.getName()).log(Level.SEVERE, null, ex);
} catch (ClassNotFoundException ex) {
Logger.getLogger(RomaServlet.class.getName()).log(Level.SEVERE, null, ex);
}
}
session.setAttribute("Count", 1 + (Integer) session.getAttribute("Count"));
response.setContentType("text/plain");
PrintWriter out = response.getWriter();
out.println("Complete Login");

} else //if(type.equals("2"))
{
/* System.out.println("f*** GOD D D D D D ");
HttpSession session = request.getSession(false);
BasicMessenger mm;
mm = (BasicMessenger) session.getAttribute("messenger");
//HelloMessenger h = new HelloMessenger(mm.mymessenger);
mm.sendd("ya nealay");
mm.mymessenger.sendText(mm.mymessenger.getContactList().getContacts()[1].getEmail(), "hi williamroma");
PrintWriter out=response.getWriter();
out.println(mm.mymessenger.getOwner().getEmail().toString());
out.println(mm.mymessenger.getContactList().getContacts().length);
for(int i=0;i<mm.mymessenger.getContactList().getContacts().length;i++)
out.println(mm.mymessenger.getContactList().getContacts()[i].getEmail().toString());
* */
if (type.equals("2")) {
HttpSession session = request.getSession(false);
m = (BasicMessenger) session.getAttribute("messenger");
PrintWriter out = response.getWriter();
out.print(m.mymessenger.getContactList().getContacts().length);
for (int i = 0; i < m.mymessenger.getContactList().getContacts().length; i++) {
out.print(m.mymessenger.getContactList().getContacts()[i].getFriendlyName().length());
out.print('_');
out.print(m.mymessenger.getContactList().getContacts()[i].getFriendlyName());
}
}
if (type.equals("3")) {
HttpSession session = request.getSession(false);
m = (BasicMessenger) session.getAttribute("messenger");
BufferedReader br = request.getReader();
String dataReceived = "";
int ch;
while ((ch = br.read()) != -1) {
dataReceived += (char) ch;
}
m.mymessenger.sendText(m.mymessenger.getContactList().getContacts()[1].getEmail(), dataReceived);
}
if (type.equals("4")) {

HttpSession session = request.getSession(false);
m = (BasicMessenger) session.getAttribute("messenger");
TottiLisner t = new TottiLisner();
t.out=response.getWriter();
m.mymessenger.addListener(t);
while (t.rrr != true) {
}
t.rrr = false;

PrintWriter out = response.getWriter();
out.println(t.mmm);
}
}
}
}

williamroma13-May-11 13:15

Re: how to make a listener to receive from HttpConnection

13-May-11 13:15

this is the listener in the server

when i receive the IM
it is automaticllaly called the function
instantMessageReceived

<b>(SORRY FOR MY BAD ENGLISH)
(THANK YOU VERY MUCH)</b>

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package example;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletResponse;
import net.sf.jml.MsnContact;
import net.sf.jml.MsnMessenger;
import net.sf.jml.MsnSwitchboard;
import net.sf.jml.event.MsnAdapter;
import net.sf.jml.message.MsnDatacastMessage;
import net.sf.jml.message.MsnInstantMessage;

/**
*
* @author William
*/
public class TottiLisner extends MsnAdapter{

public boolean rrr=false;
public MsnInstantMessage mmm;
public PrintWriter out;
public void exceptionCaught(MsnMessenger messenger, Throwable throwable) {
for(int i=0;i<10;i++)
System.out.println("TOTTI TOTTI TOTTI TOTTI TOTTI TOTTI");
}

public void instantMessageReceived(MsnSwitchboard switchboard,
MsnInstantMessage message,
MsnContact friend) {

rrr=true;
this.mmm=message;
}

public void datacastMessageReceived(MsnSwitchboard switchboard,
MsnDatacastMessage message,
MsnContact friend) {
for(int i=0;i<10;i++)
System.out.println("BUFFON BUFFON BUFFON BUFFON BUFFON");
}

}

williamroma13-May-11 9:11

Re: how to make a listener to receive from HttpConnection

13-May-11 9:11

but i dont't want to use socket

tyvm

jschell13-May-11 12:15

how to read exact content of word in java

13-May-11 12:15

williamroma wrote:
but i dont't want to use socket

Huh?

HTTP is protocol based on TCP, thus sockets.

Thus your statement in the context of your question is nonsensical.

priya218411-May-11 0:03

priya2184

11-May-11 0:03

Sir ,
Can any one help me in reading the exact word content.
I have the following code with me:

_____***********Code start here*********----------------

import java.io.File;
import java.io.FileInputStream;

import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.extractor.WordExtractor;

public class DocRead1 {

public void readDocFile() {
File docFile = null;
WordExtractor docExtractor = null ;
WordExtractor exprExtractor = null ;
try {
docFile = new File("/Users/priyaranjan/Desktop/Hello.doc");
//A FileInputStream obtains input bytes from a file.
FileInputStream fis=new FileInputStream(docFile.getAbsolutePath());

//A HWPFDocument used to read document file from FileInputStream
HWPFDocument doc=new HWPFDocument(fis);

docExtractor = new WordExtractor(doc);
}
catch(Exception exep)
{
System.out.println(exep.getMessage());
}

//This Array stores each line from the document file.
String [] docArray = docExtractor.getParagraphText();

for(int i=0;i<docArray.length;i++)
{
if(docArray[i] != null)
System.out.println("Line "+ i +" : " + docArray[i]);
}
}

public static void main(String[] args) {
DocRead1 reader = new DocRead1();
reader.readDocFile();
}
}

------------*******Code ends here*********________________________

But i am getting the same out put whenever i made a change in font of letters used in word.I mean suppose in first case i have made the letter bold then in the second case i have made the letters italics.
But the above program is giving me the same output in both the case.I want to read the exact content of word document.

Can any one help me in this case...

Regards,
Priya

Re: how to read exact content of word in java

Nagy Vilmos11-May-11 0:13

Re: how to read exact content of word in java

11-May-11 0:13

Please delete as it's a duplicate.

JP_Rocks29-May-11 22:34

JP_Rocks

29-May-11 22:34

Duplicate + No Code format (Pre Tags)

***** Programme comme si dept soutien technique. est plein de tueurs en série et ils savent adresse de votre domicile. *****

how to read exact content of word in java

priya218411-May-11 0:02

priya2184

11-May-11 0:02

Sir ,
Can any one help me in reading the exact word content.
I have the following code with me:

_____***********Code start here*********----------------

import java.io.File;
import java.io.FileInputStream;

import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.extractor.WordExtractor;

public class DocRead1 {

public void readDocFile() {
File docFile = null;
WordExtractor docExtractor = null ;
WordExtractor exprExtractor = null ;
try {
docFile = new File("/Users/priyaranjan/Desktop/Hello.doc");
//A FileInputStream obtains input bytes from a file.
FileInputStream fis=new FileInputStream(docFile.getAbsolutePath());

//A HWPFDocument used to read document file from FileInputStream
HWPFDocument doc=new HWPFDocument(fis);

docExtractor = new WordExtractor(doc);
}
catch(Exception exep)
{
System.out.println(exep.getMessage());
}

//This Array stores each line from the document file.
String [] docArray = docExtractor.getParagraphText();

for(int i=0;i<docArray.length;i++)
{
if(docArray[i] != null)
System.out.println("Line "+ i +" : " + docArray[i]);
}
}

public static void main(String[] args) {
DocRead1 reader = new DocRead1();
reader.readDocFile();
}
}

------------*****************________________________

But i am getting the same out put whenever i made a change in font of letters used in word.I mean suppose in first case i have made the letter bold then in the second case i have made the letters italics.
But the above program is giving me the same output in both the case.I want to read the exact content of word document.

Can any one help me in this case...

Regards,
Priya

Re: how to read exact content of word in java

Nagy Vilmos11-May-11 0:17

Creating an object of a superclass

11-May-11 0:17

You are reading out the text from the document and ignoring the markup.
Check the API to see if you can maybe read it as RTF or with some other markup so you can see the changes.

kurt110-May-11 9:20

kurt1

10-May-11 9:20

Hi All,
I think the answer to this is easy but its been causing me all kinds of problems. If i want to create an object of a super class in a subclass, how do i go about it if the superclass has arguments? Eg

Superclass Player - has the constructor:
public Player (Animation left, Animation right){
super(left, right)
this.left = left;
this.right = right;}

To make things more complecated the Player class extends another class with the following arguments:
public Monster (Animation left, Animation right){
super(right);
this.left = left;
this.right = right;}

Finally Monster extends Sprite
public Sprite(Animation a){
this.a = a;}

I want to create an object (instance) of Player in a new class called InventoryItems so it gives me access to all of the methods of the Player class (cant extend the class Player as im already extending another class), can anyone help?

Thank you.

Re: Creating an object of a superclass [modified]

Luc Pattyn10-May-11 12:43

Luc Pattyn

10-May-11 12:43

When you have an inheritance chain child -> father -> grandfather, then each class constructor can access its father's constructor, and each class method can call it's fathers methods using the super keyword as documented here[^], however the child cannot access constructors nor methods of his grandfather.

This is inherent on how object-orientation works, it is the same in C# (where super is called base); if you feel a need to do that, your design is probably flawed.

Have you considered using interfaces instead of, or on top of, inheritance?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

modified on Tuesday, May 10, 2011 6:59 PM

Re: Creating an object of a superclass

Nagy Vilmos10-May-11 23:11

Re: Creating an object of a superclass

10-May-11 23:11

Further to Luc's excellent answer your classes are:

class Sprite {
   ...
}

class Monster
      extends Sprite {
   ...
}

class Player
      extends Monster {
   ...
}

You need to have an interface for InventoryItems that defines all the methods required and then impliement it in Player:

class Player
      extends Monster
      impliments InventoryInterface {
   ...
}

Luc Pattyn11-May-11 0:54

Luc Pattyn

11-May-11 0:54

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: Creating an object of a superclass

jschell11-May-11 8:49