datagrammidlet.java

《J2ME实用教程》 源文件下载 本书没有仅仅局限于J2ME单机游戏的开发

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.midlet.MIDlet;
public class DatagramMIDlet extends MIDlet implements CommandListener
{
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;
ChoiceGroup cg;
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);
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());
if (name.equals(SERVER))
{
Server server = new Server(this);
server.start();
} else
{
Client client = new Client(this);
client.start();
 
}
}
}
}