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"Building a Connected Midlet"
Vol. 8, Issue 12, p. 49
Listing 1
OutputStream outStream = con.getOutputStream();
DataOutputStream dataOutStream = new DataOutputStream(outStream);
dataOutStream.writeUTF(toSend);
InputStream inStream = con.getInputStream();
DataInputStream dataInStream = new DataInputStream(inStream);
//get the response from the server
fromServer = dataInStream.readUTF();
System.out.println("Reply from Servlet: " + fromServer);
Listing 2
InputStream in = req.getInputStream();
OutputStream out = res.getOutputStream();
DataInputStream dataIn = new DataInputStream(in);
DataOutputStream dataOut = new DataOutputStream(out);
//read in the value passed in
String passedIn = dataIn.readUTF();
//use this value to send back
String toReturn = passedIn;
res.setContentType("application/octet-stream");
//write it out to the response
dataOut.writeUTF(toReturn);
dataOut.flush();
Listing 3
private void outputEcho() {
...
String fromUser = "foo";
HttpConnection con = openConnection();
DataOutputStream dataOutStream = openConnectionOutputStream(con);
dataOutStream.writeUTF(fromUser);
DataInputStream dataInStream = openConnectionInputStream(con);
//get the response from the server
String fromServer;
fromServer = dataInStream.readUTF();
//close all the connection pieces and free resources
closeConnection(con, dataOutStream, dataInStream);
//display the results to the user
Form outputForm = new Form("Echo Output");
outputForm.append(fromServer);
outputForm.addCommand(EXIT);
outputForm.setCommandListener(this);
display.setCurrent(outputForm);
...
}
Listing 4
int responseCode = connection.getResponseCode();
if (responseCode == HttpConnection.HTTP_OK ||
responseCode == HttpConnection.HTTP_CREATED) {
if (responseCode == HttpConnection.HTTP_CREATED) {
// If the server forwarded to another URL, use that URL
// next time.
serviceURL = connection.getHeaderField("Location");
}
DataInputStream inputStream = connection.openDataInputStream();
return inputStream;
} else {
System.out.println("openConnectionInputStream failed!!!");
}
Listing 5
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type"
content="text/html; charset=ISO-8859-1">
<title>Altisimo Computing</title>
</head>
<body>
<h1>Altisimo Computing</h1>
<p>Altisimo is your source for J2ME applications,
consulting, and training.<br>
Call us at 888-868-4306.<br></p>
<p>Downloads:<br></p>
<ul>
<li><a href="hello.jad">Hello World</a>
(license: <a href="LICENSE-GPL-MULTIPART">GPL</a>)</li>
<li><a href="echo.jad">Echo</a>
(license: <a href="LICENSE-GPL-MULTIPART">GPL</a>,
<a href="LICENSE-Sun">Sun</a>)</li>
</ul>
</body>
</html>
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