UNIX for Dummies Questions & Answers

hi everyone
i am attaching a java code below,
it is running perfectly fine on windows but not on unix system.
unix system is having java 1.2 environment.
and this code is java 1.1 onwards compatible.
WELL THE ERROR GIVEN IS UNKNOWN HOST EXCEPTION
plz help me out.
import java.net.*;
import java.io.*;
import java.util.*;
public class MailTest
{
private BufferedReader in;
PrintWriter out;
String response=" ";
public MailTest()
{
try
{
Socket s= new Socket("mail.punjab.spiceindia.com", 25);
out = new PrintWriter( s.getOutputStream());
in = new BufferedReader (new InputStreamReader (s.getInputStream())); String hostName= InetAddress.getLocalHost().getHostName();
send(null);
send("HELO" + hostName );
send("MAIL FROM:" + "rajiv_kaura@spiceindia.com" );
send("RCPT TO:"+ "randeep_bhalla@spiceindia.com");
send("this is test mail");
out.println("test mail");
send(".");
s.close(); \
}
catch(IOException e)
{
System.out.print(e.toString());
}
}
public void send(String s) throws IOException
{
if (s!=null)
{
out.println(s);
out.flush();
}

}
public static void main(String[] args)
{
MailTest m1=new MailTest();
}
}

what is the error that you receive ?
First, you have wrong syntax on line 23 : what is the slash for ? The compiler doesn't like it . Since class MailTest is public, should be declared in a file named MailTest.java.
By the way, here's my output of "java -showversion"

Code:

java version "1.5.0_09"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_09-b03)
Java HotSpot(TM) Client VM (build 1.5.0_09-b03, mixed mode, sharing)