J2MEFileConnection.java Source code

Introduction

Here is the source code for J2MEFileConnection.java

Source

import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

import javax.microedition.io.ConnectionNotFoundException;
import javax.microedition.io.Connector;
import javax.microedition.io.OutputConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
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.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class J2MEFileConnection extends MIDlet implements CommandListener {
    private Command exit = new Command("Exit", Command.EXIT, 1), start = new Command("Start", Command.EXIT, 1);

    private Display display;

    private Form form = new Form("Write To File");

    public J2MEFileConnection() {
        display = Display.getDisplay(this);
        form.addCommand(exit);
        form.addCommand(start);
        form.setCommandListener(this);
    }

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

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command command, Displayable displayable) {
        if (command == exit) {
            destroyApp(false);
            notifyDestroyed();
        } else if (command == start) {
            try {
                OutputConnection connection = (OutputConnection) Connector.open("file://c:/myfile.txt;append=true",
                        Connector.WRITE);
                OutputStream out = connection.openOutputStream();
                PrintStream output = new PrintStream(out);
                output.println("This is a test.");
                out.close();
                connection.close();
                Alert alert = new Alert("Completed", "Data Written", null, null);
                alert.setTimeout(Alert.FOREVER);
                alert.setType(AlertType.ERROR);
                display.setCurrent(alert);
            } catch (Exception error) {
                Alert alert = new Alert("Error", error.toString(), null, null);
                alert.setTimeout(Alert.FOREVER);
                alert.setType(AlertType.ERROR);
                display.setCurrent(alert);
            }
        }
    }
}