how to read text file in j2me

[sachinwarang]

Hi,
I want to build an application in which i've to read text file.Can any one help me regarding this.Is there any API/method/site for reference to do so?(with actual example's source code.)

Sachin Warang.

[balagopalks]

Here are some links that might be of some interest to you.

http://developers.sun.com/techtopics...ork/index.html
http://developers.sun.com/techtopics...ion/index.html
http://developers.sun.com/techtopics...icles/network/

Regards
Gopal

[Salah Uddin]

Hi

I develop an mobile application. which need to read text file.
i am faceing one problem. when i run the application in my desktop. i have use the file path, file:///root1/myText.txt, it is working in my desktop..
but when i run this application in mobile the application is not getting the path.. would you plz help me.... how i need to show the path.. like for mobile Nokia N97, or N70.. or any common path for all the mobiles

[Salah Uddin]

Hi Sachin.

I thing the following coul help you..

import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ReadFile extends MIDlet implements CommandListener{
private Display display;
private Form form;
private Command read, exit;
private Alert alert;

public ReadFile(){
display = Display.getDisplay(this);
read = new Command("Read", Command.SCREEN, 1);
exit = new Command("Exit", Command.EXIT, 1);
form = new Form("Read File");
form.addCommand(exit);
form.addCommand(read);
form.setCommandListener(this);
}

public void startApp(){
display.setCurrent(form);
}

public void pauseApp(){}

public void destroyApp(boolean unconditional){
notifyDestroyed();
}

public void commandAction(Command c, Displayable s){
String label = c.getLabel();
if (label.equals("Read")){
String string = file();
if (string != null){
alert = new Alert("Reading", string, null, null);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert, form);
}
} else if (label.equals("Exit")){
destroyApp(false);
}
}

private String file(){
InputStream is = getClass().getResourceAsStream("help.txt");
StringBuffer sb = new StringBuffer();
try{
int chars, i = 0;
while ((chars = is.read()) != -1){
sb.append((char) chars);
}
return sb.toString();
}catch (Exception e){}
return null;
}
}

[rahulvala]

This should be used for path : file:///C:/Data/+

Also see the File connection API document for reference. Search in the wiki Java .

Best regards,

[prajapati.ajay]

hi frnd,

your application will not work on mobile application if you hard coded root name of filesystem.In Nokia and sony phone you will find C: and EMemory card).and In samsung and LG also have different.so dont hard code value.first find root of mobile.by using FileSystemRegistry.listRoots().

[Hesam]

This is my code to read an image. simply you can change it to read text message:

public Image readFile(String path)//test===============
    {
        try
        {
            FileConnection fc = (FileConnection)Connector.open(path, Connector.READ);
            if(!fc.exists()) {
                System.out.println("File doesn't exist!");
            }
            else
            {
                int size = (int)fc.fileSize();
                InputStream is = fc.openInputStream();
                byte bytes[] = new byte[size];
                is.read(bytes, 0, size);
                image = Image.createImage(bytes, 0, size);
            }

        } catch (IOException ioe) {
            System.out.println("IOException: "+ioe.getMessage());
        } catch (IllegalArgumentException iae) {
            System.out.println("IllegalArgumentException: "+iae.getMessage());
        }
        
        return image;
    }