[Solixious]

Here is a snippet code which can perform Port Scanning of your localhost or the host you pass as argument.

Code:

import java.net.*;
import java.io.*;
public class PortScanner
{
    public static void main(String[] args)
    {
        String host = "localhost";
        if (args.length > 0)
        {
            host = args[0];
        }    
        for (int i = 1; i < 1024; i++)
        {
            try
            {
                Socket s = new Socket(host, i);
                System.out.println("There is a server on port " + i + " of "+ host);    
            }
            catch (UnknownHostException ex)
            {
                System.err.println(ex);
                break;
            }
            catch (IOException ex)
            {
                ex.printStackTrace();
            }
        } // end for
    } // end main
} // end PortScanner