datagrammidlet.java

Networki demo is MIDlet written by WTK

/*
 *
 * Copyright (c) 2007, Sun Microsystems, Inc.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of Sun Microsystems nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package datagram;

import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
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.lcdui.TextField;
import javax.microedition.midlet.MIDlet;

public class DatagramMIDlet extends MIDlet implements CommandListener {
    private static final int DEFAULT_PORT = 5555;

    private static final String SERVER = "Server";

    private static final String CLIENT = "Client";

    private static final String[] names = { SERVER, CLIENT };

    private static Display display;

    private Form f;

    private ChoiceGroup cg;

    private TextField portField;

    private boolean isPaused;

    private Command exitCommand = new Command("Exit", Command.EXIT, 1);

    private Command startCommand = new Command("Start", Command.ITEM, 1);

    public DatagramMIDlet() {
	display = Display.getDisplay(this);
	f = new Form("Datagram Demo");
	cg = new ChoiceGroup("Please select peer", Choice.EXCLUSIVE, names,
		null);
	f.append(cg);
	portField = new TextField("Port number:", String.valueOf(DEFAULT_PORT),
		6, TextField.NUMERIC);
	f.append(portField);

	f.addCommand(exitCommand);
	f.addCommand(startCommand);
	f.setCommandListener(this);

	display.setCurrent(f);
    }

    public static Display getDisplay() {
	return display;
    }

    public boolean isPaused() {
	return isPaused;
    }

    public void startApp() {
	isPaused = false;
    }

    public void pauseApp() {
	isPaused = true;
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command c, Displayable s) {
	if (c == exitCommand) {
	    destroyApp(true);
	    notifyDestroyed();
	} else if (c == startCommand) {
	    String name = cg.getString(cg.getSelectedIndex());
	    int port = Integer.parseInt(portField.getString());

	    if (name.equals(SERVER)) {
		Server server = new Server(this, port);
		server.start();
	    } else {
		Client client = new Client(this, port);
		client.start();
	    }
	}
    }
}