مثال يوضح كيفية قرأة ملف و اظهار محتواه من نوع txt

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

public class ReadDisplayFile extends MIDlet implements CommandListener
{
  private Display display;	// Reference to Display object
  private Form fmMain;	   // Main form
  private Command cmHelp;	// Command to show a help file
  private Command cmExit;	// Command to exit the MIDlet
  private Alert alHelp;	  // Alert to display help file text

  public ReadDisplayFile()
  {
	display = Display.getDisplay(this);
	cmHelp = new Command("Help", Command.SCREEN, 1);
	cmExit = new Command("Exit", Command.EXIT, 1);	
	fmMain = new Form("Read File");
	fmMain.addCommand(cmExit);
	fmMain.addCommand(cmHelp);
	fmMain.setCommandListener(this);
  }

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

  public void pauseApp()
  { }

  public void destroyApp(boolean unconditional)
  { }

  public void commandAction(Command c, Displayable s)
  {
	if (c == cmHelp)
	{
	  String str;
	  // Access the resource and read its contents
	  if ((str = readHelpText()) != null)
	  {
		// Create an Alert to display the help text		
		alHelp = new Alert("Help", str, null, null);
		alHelp.setTimeout(Alert.FOREVER);
		display.setCurrent(alHelp, fmMain);
	  }
	}
	else if (c == cmExit)
	{
	  destroyApp(false);
	  notifyDestroyed();
	} 
  }
  private String readHelpText()
  {
	InputStream is = getClass().getResourceAsStream("help.txt");
	try 
	{
	  StringBuffer sb = new StringBuffer();
	  int chr, i = 0;
	  // Read until the end of the stream	  
	  while ((chr = is.read()) != -1)
		  sb.append((char) chr);

	  return sb.toString();
	}
	catch (Exception e)
	{		 
	  System.out.println("Unable to create stream");
	}
	return null;
  }
}