كيفية قراءة ملف txt في J2ME

/*--------------------------------------------------
 * ReadDisplayFile.java
 *
 * Example from the book:	 Core J2ME Technology
 * Copyright John W. Muchow   http://www.CoreJ2ME.com
 * You may use/modify for any non-commercial purpose
 *-------------------------------------------------*/
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("h.txt");
		try {
			StringBuffer sb = new StringBuffer();
			int chr;
			// 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(e.toString());
		}
		return "";
	}
}

الملف لازم يكون في res