Socket connection : Networks « J2ME « Java

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Java » J2ME » NetworksScreenshots 
Socket connection
Socket connection

/*
J2ME: The Complete Reference

James Keogh

Publisher: McGraw-Hill

ISBN 0072227109

*/
// jad file (Please verify the jar size first)
/*
MIDlet-Name: socketconnection
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: socketconnection.jar
MIDlet-1: socketconnection, , socketconnection
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100

*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.io.*;
public class socketconnection extends MIDlet implements CommandListener {
  private Command exit, start;
  private Display display;
  private Form form;
  public socketconnection () 
  {
    display = Display.getDisplay(this);
    exit = new Command("Exit", Command.EXIT, 1);
    start = new Command("Start", Command.EXIT, 1);
    form new Form("Read Write Socket");
    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 
      {
       StreamConnection connection = (StreamConnectionConnector.open("socket://www.myserver.com:80");
       PrintStream output = 
         new PrintStream(connection.openOutputStream() );
       output.println"GET /my.html HTTP/0.9\n\n" );
       output.flush();
       InputStream in = connection.openInputStream();
       int ch;
       while( ( ch = in.read() ) != -)
      {
         System.out.print( (charch );
       }
       in.close();
       output.close();
       connection.close();
     }
      catchConnectionNotFoundException error )
       {
         Alert alert = new Alert(
            "Error""Cannot access socket.", null, null);
         alert.setTimeout(Alert.FOREVER);
         alert.setType(AlertType.ERROR);
         display.setCurrent(alert);      
        }
        catchIOException error )
        {
         Alert alert = new Alert("Error", error.toString(), null, null);
         alert.setTimeout(Alert.FOREVER);
         alert.setType(AlertType.ERROR);
         display.setCurrent(alert);
        }
    }
  }
}


           
       
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