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I'm extremely new to Java and TINI - can you show me how to get a "hello world" program running on my TINI board?

Created May 4, 2012

Tim Rohaly

Here's a walkthrough to get your first piece of code up and running. For more sophisticated examples, including examples of how to read and write to the 1-wire bus, see the examples folder included with the TINI firmware.

  1. Create a file HelloWeb.java containing the following: 
    import java.io.*;
import java.net.*;


public class HelloWeb {

    public static void main(String[] args) throws IOException {
        System.out.println("Hello, Web!");
        // Delete the rest of this method if you just want a simple hello world.
        ServerSocket server = new ServerSocket(80);
        while (true) {
            Socket socket = server.accept();

            PrintWriter    out = new PrintWriter(socket.getOutputStream());
            BufferedReader in  = new BufferedReader(
                                     new InputStreamReader(socket.getInputStream()));

            // Read in the HTTP headers
            String s;
            while ((s = in.readLine()) != null) {
                System.out.println(s);
                if (s.equals("")) break;
            }

            // HTTP headers done, send reply
            out.print("HTTP/1.0 200 OK

");
            out.print("<html><body><h1>Hello, Web!<h1><body><html>
");
            out.flush();
            socket.close();
            System.gc();
        }
    }
}
  2. Compile this code using your java compiler. The TINI firmware is assumed to be installed in C: inibeta3.0, and Windows syntax is shown: 
    C:>set TINI_HOME=c:	inibeta3.0
C:>javac -bootclasspath %TINI_HOME%bin	iniclasses.jar HelloWeb.java
  3. Next, you need to convert the .class file created by the Java compiler into a .tini file which can be run on the TINI: 
    C:>java -classpath %TINI_HOME%bin	ini.jar TINIConvertor -f HelloWeb.class
              -o HelloWeb.tini -d %TINI_HOME%bin	ini.db
  4. Copy the .tini file to your TINI. The hostname of the TINI is assumed to be "tini" here. 
    C:>ftp tini
Connected to tini.
220 Welcome to slush.  (Version 1.0 Beta 3)  Ready for user login.
User (tini:(none)): root
331 root login allowed. Password required.
Password:
230 User root logged in.
ftp> bin
200 Type set to Binary
ftp> put HelloWeb.tini
200 PORT Command successful.
150 BINARY connection open, putting HelloWeb.tini
226 Closing data connection.
381 bytes sent in 0.00 seconds (381000.00 Kbytes/sec)
ftp>quit
221 Goodbye.
  5. Log on to your TINI using TELNET then start the HelloWeb server with the command: 
    java HelloWeb.tini &
  6. At this point, your HelloWeb server is running on your TINI. If you connect to your TINI by entering the URL http://tini/ in your web browser, the HelloWeb server will respond and a message will be displayed in your browser.