{"id":457,"date":"2007-12-01T00:00:00","date_gmt":"2007-11-30T16:00:00","guid":{"rendered":"http:\/\/www.strongd.net\/?p=457"},"modified":"2011-07-15T09:55:01","modified_gmt":"2011-07-15T01:55:01","slug":"j2mesocket-connection","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=457","title":{"rendered":"j2me:Socket connection"},"content":{"rendered":"

\/*
J2ME: The Complete Reference<\/FONT>
<\/FONT>
James Keogh<\/FONT>
<\/FONT>
Publisher: McGraw-Hill<\/FONT>
<\/FONT>
ISBN 0072227109<\/FONT>
<\/FONT>
*\/<\/FONT>
\/\/ jad file (Please verify the jar size first)<\/FONT>
\/*<\/FONT>
MIDlet-Name: socketconnection<\/FONT>
MIDlet-Version: 1.0<\/FONT>
MIDlet-Vendor: MyCompany<\/FONT>
MIDlet-Jar-URL: socketconnection.jar<\/FONT>
MIDlet-1: socketconnection, , socketconnection<\/FONT>
MicroEdition-Configuration: CLDC-1.0<\/FONT>
MicroEdition-Profile: MIDP-1.0<\/FONT>
MIDlet-JAR-SIZE: 100<\/FONT>
<\/FONT>
*\/<\/FONT>
import <\/B><\/FONT>javax.microedition.midlet.*;<\/FONT>
import <\/B><\/FONT>javax.microedition.lcdui.*;<\/FONT>
import <\/B><\/FONT>java.io.*;<\/FONT>
import <\/B><\/FONT>javax.microedition.io.*;<\/FONT>
public class <\/B><\/FONT>socketconnection <\/FONT>extends <\/B><\/FONT>MIDlet <\/FONT>implements <\/B><\/FONT>CommandListener <\/FONT>{<\/FONT>
  <\/FONT>private <\/B><\/FONT>Command exit, start;<\/FONT>
  <\/FONT>private <\/B><\/FONT>Display display;<\/FONT>
  <\/FONT>private <\/B><\/FONT>Form <\/FONT>form<\/B><\/FONT>;<\/FONT>
  <\/FONT>public <\/B><\/FONT>socketconnection <\/FONT>() <\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>display = Display.getDisplay<\/FONT>(<\/FONT>this<\/B><\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>exit = <\/FONT>new <\/B><\/FONT>Command<\/FONT>(<\/FONT>“Exit”<\/FONT>, Command.EXIT, <\/FONT>1<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>start = <\/FONT>new <\/B><\/FONT>Command<\/FONT>(<\/FONT>“Start”<\/FONT>, Command.EXIT, <\/FONT>1<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>form <\/B><\/FONT>= <\/FONT>new <\/B><\/FONT>Form<\/FONT>(<\/FONT>“Read Write Socket”<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>form<\/B><\/FONT>.addCommand<\/FONT>(<\/FONT>exit<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>form<\/B><\/FONT>.addCommand<\/FONT>(<\/FONT>start<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>form<\/B><\/FONT>.setCommandListener<\/FONT>(<\/FONT>this<\/B><\/FONT>)<\/FONT>;<\/FONT>
  <\/FONT>}<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>startApp<\/FONT>() <\/FONT>throws <\/B><\/FONT>MIDletStateChangeException <\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>display.setCurrent<\/FONT>(<\/FONT>form<\/B><\/FONT>)<\/FONT>;<\/FONT>
  <\/FONT>}<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>pauseApp<\/FONT>() <\/FONT>
  <\/FONT>{<\/FONT>
  <\/FONT>}<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>destroyApp<\/FONT>(<\/FONT>boolean <\/B><\/FONT>unconditional<\/FONT>) <\/FONT>
  <\/FONT>{<\/FONT>
  <\/FONT>}<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>commandAction<\/FONT>(<\/FONT>Command command, Displayable displayable<\/FONT>) <\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>if <\/B><\/FONT>(<\/FONT>command == exit<\/FONT>) <\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>destroyApp<\/FONT>(<\/FONT>false<\/B><\/FONT>)<\/FONT>;<\/FONT>
      <\/FONT>notifyDestroyed<\/FONT>()<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>else if <\/B><\/FONT>(<\/FONT>command == start<\/FONT>) <\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>try <\/B><\/FONT>
      <\/FONT>{<\/FONT>
       <\/FONT>StreamConnection connection = <\/FONT>(<\/FONT>StreamConnection<\/FONT>) <\/FONT>Connector.open<\/FONT>(<\/FONT>“socket:\/\/www.myserver.com:80”<\/FONT>)<\/FONT>;<\/FONT>
       <\/FONT>PrintStream output = <\/FONT>
         <\/FONT>new <\/B><\/FONT>PrintStream<\/FONT>(<\/FONT>connection.openOutputStream<\/FONT>() )<\/FONT>;<\/FONT>
       <\/FONT>output.println<\/FONT>( <\/FONT>“GET \/my.html HTTP\/0.9\\n\\n” <\/FONT>)<\/FONT>;<\/FONT>
       <\/FONT>output.flush<\/FONT>()<\/FONT>;<\/FONT>
       <\/FONT>InputStream in = connection.openInputStream<\/FONT>()<\/FONT>;<\/FONT>
       <\/FONT>int <\/B><\/FONT>ch;<\/FONT>
       <\/FONT>while<\/B><\/FONT>( ( <\/FONT>ch = in.read<\/FONT>() ) <\/FONT>!= –<\/FONT>1 <\/FONT>)<\/FONT>
      <\/FONT>{<\/FONT>
         <\/FONT>System.out.print<\/FONT>( (<\/FONT>char<\/B><\/FONT>) <\/FONT>ch <\/FONT>)<\/FONT>;<\/FONT>
       <\/FONT>}<\/FONT>
       <\/FONT>in.close<\/FONT>()<\/FONT>;<\/FONT>
       <\/FONT>output.close<\/FONT>()<\/FONT>;<\/FONT>
       <\/FONT>connection.close<\/FONT>()<\/FONT>;<\/FONT>
     <\/FONT>}<\/FONT>
      <\/FONT>catch<\/B><\/FONT>( <\/FONT>ConnectionNotFoundException error <\/FONT>)<\/FONT>
       <\/FONT>{<\/FONT>
         <\/FONT>Alert alert = <\/FONT>new <\/B><\/FONT>Alert<\/FONT>(<\/FONT>
            <\/FONT>“Error”<\/FONT>, <\/FONT>“Cannot access socket.”<\/FONT>, null, <\/FONT>null<\/B><\/FONT>)<\/FONT>;<\/FONT>
         <\/FONT>alert.setTimeout<\/FONT>(<\/FONT>Alert.FOREVER<\/FONT>)<\/FONT>;<\/FONT>
         <\/FONT>alert.setType<\/FONT>(<\/FONT>AlertType.ERROR<\/FONT>)<\/FONT>;<\/FONT>
         <\/FONT>display.setCurrent<\/FONT>(<\/FONT>alert<\/FONT>)<\/FONT>;      <\/FONT>
        <\/FONT>}<\/FONT>
        <\/FONT>catch<\/B><\/FONT>( <\/FONT>IOException error <\/FONT>)<\/FONT>
        <\/FONT>{<\/FONT>
         <\/FONT>Alert alert = <\/FONT>new <\/B><\/FONT>Alert<\/FONT>(<\/FONT>“Error”<\/FONT>, error.toString<\/FONT>()<\/FONT>, null, <\/FONT>null<\/B><\/FONT>)<\/FONT>;<\/FONT>
         <\/FONT>alert.setTimeout<\/FONT>(<\/FONT>Alert.FOREVER<\/FONT>)<\/FONT>;<\/FONT>
         <\/FONT>alert.setType<\/FONT>(<\/FONT>AlertType.ERROR<\/FONT>)<\/FONT>;<\/FONT>
         <\/FONT>display.setCurrent<\/FONT>(<\/FONT>alert<\/FONT>)<\/FONT>;<\/FONT>
        <\/FONT>}<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}<\/FONT>
}<\/FONT><\/FONT>

\n

<\/DIV><\/p>\n","protected":false},"excerpt":{"rendered":"

\/*J2ME: The Complete ReferenceJames KeoghPublisher: McGraw-HillISBN 0072227109*\/\/\/ jad file (Please verify the jar size first)\/*MIDlet-Name: socketconnectionMIDlet-Version: 1.0MIDlet-Vendor: MyCompanyMIDlet-Jar-URL: socketconnection.jarMIDlet-1: socketconnection, , socketconnectionMicroEdition-Configuration: CLDC-1.0MicroEdition-Profile: MIDP-1.0MIDlet-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 = (StreamConnection) Connector.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() ) != –1 )      {         System.out.print( (char) ch );       }       in.close();       output.close();       connection.close();     }      catch( ConnectionNotFoundException error )       {         Alert alert = new Alert(            “Error”, “Cannot access socket.”, null, null);         alert.setTimeout(Alert.FOREVER);         alert.setType(AlertType.ERROR);         display.setCurrent(alert);              }        catch( IOException error )        {         Alert alert = new Alert(“Error”, error.toString(), null, null);         alert.setTimeout(Alert.FOREVER);         alert.setType(AlertType.ERROR);         display.setCurrent(alert);        }    }  }}<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[131],"class_list":["post-457","post","type-post","status-publish","format-standard","hentry","category-java","tag-j2mesocket"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=457"}],"version-history":[{"count":1,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/457\/revisions"}],"predecessor-version":[{"id":933,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/457\/revisions\/933"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}