Thread: J2ME and files
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Old 01-14-2008, 01:58 AM
bartosz666 bartosz666 is offline
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J2ME and files
after I launch netbeans' mobile phone emulator and choose the middlet to execute in the emulator screen I got a question if I wish to execute a 'reading' operation on file. When I click 'Yes' the program instead of reading the file - immidiately ends working and comes back to midlet list... and the requested read of file and printing its conent doesn work...

below is the code:

Code:
/* * live.java * * Created on 12 styczeń 2008, 02:18 */ package futbol24; import java.io.IOException; import javax.microedition.lcdui.*; import javax.microedition.io.*; // do laczenia sie z serwerem import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import com.sun.midp.io.j2me.storage.File; import com.sun.perseus.platform.BufferedInputStream; import java.io.*; import javax.microedition.io.file.*; /** * * @author bart * @version */ public class live extends MIDlet implements CommandListener { public live() { } private Form helloForm; private TextBox helloTextBox; private StringItem helloStringItem; private Command exitCommand; private void initialize() throws IOException { getDisplay().setCurrent(get_helloForm()); } public void commandAction(Command command, Displayable displayable) { if (displayable == helloForm) { if (command == exitCommand) { exitMIDlet(); } } } public Display getDisplay() { return Display.getDisplay(this); } public void exitMIDlet() { getDisplay().setCurrent(null); destroyApp(true); notifyDestroyed(); } static String getLine(InputStream is) { String linijka = ""; try { byte b[] = new byte[1]; int koniec; koniec = is.read(b); if( koniec != -1 ) { while((new String(b).equals("\r")==false) && koniec!=-1) //wczytuje cala linijke { linijka+=new String(b); koniec = is.read(b); } } else if(koniec==-1) { return "EOF"; } } catch (IOException ex) { ex.printStackTrace(); } return linijka; } public TextBox get_helloForm() throws IOException { if (helloForm == null) { HttpConnection sc = (HttpConnection)Connector.open("http://kolos.math.uni.lodz.pl/~bart/tekstowy.txt"); InputStream is = sc.openInputStream(); boolean flaga = true; String linijka; int a=0; while(flaga) { linijka = this.getLine(is); if(linijka.equals("EOF")) { System.out.println("koniec pliku"); flaga = false; break; } else { helloTextBox.insert(linijka,helloTextBox.size()); } } } return helloTextBox; } public Command get_exitCommand() { if (exitCommand == null) { exitCommand = new Command("Exit", Command.EXIT, 1); } return exitCommand; } public void startApp() { try { initialize(); } catch (IOException ex) { ex.printStackTrace(); } } public void pauseApp() { } public void destroyApp(boolean unconditional) { } }
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