JScan - simple java port scanner

Code:
import java.net.*;
import java.io.IOException;
import java.util.Scanner;



public class JScan implements Runnable {




public static void main(String[] args) {
new JScan();
}

public JScan(){
new Thread(this).start();
}

public void run()
{
String host;
int start_port, end_port;
Scanner input = new Scanner(System.in);

System.out.println("_________________________________");
System.out.println("Port Scanner coded by DreamWalker");
System.out.println(" ");
System.out.println("_________________________________\n");

 System.out.print("Target host or IP?: "); host = input.nextLine();
 System.out.print("Start port?: "); start_port = input.nextInt();
 System.out.print("End port?: "); end_port = input.nextInt();
	
 System.out.println("________________________________\nScanning...\n");
  for (int current_port = start_port; current_port <= end_port; current_port++)
   try {
		
         Socket socket = new Socket();
         socket.bind(null);
         socket.connect(new InetSocketAddress(host, current_port), 250);
         socket.close();
			
			if(current_port == 21)
			System.out.println("FTP is open "+current_port);
			else if(current_port == 22)
			System.out.println("SSH is open "+current_port);	
			else if(current_port == 23)
			System.out.println("Telnet is open "+current_port);	
			else if(current_port == 25)
			System.out.println("SMTP is open "+current_port);
			else if(current_port == 80)
                        System.out.println("HTTP is open "+current_port);
			else if(current_port == 110)
			System.out.println("POP3 is open "+current_port);
			else if(current_port == 143)
			System.out.println("IMAP is open "+current_port);
			else if(current_port == 443)
			System.out.println("SSL/HTTPS is open "+current_port);
			else if(current_port == 3389)
			System.out.println("RDP is open "+current_port);
			else if(current_port == 5900)
			System.out.println("VNC is open "+current_port);
            else System.out.println("Port open "+current_port);

        } catch (IOException ex) {}
     System.out.println("_________________________________\nFinished, please close.");
	 
		try {
              System.in.read();
            } catch (IOException e)
		      {
               e.printStackTrace();
              }
		
    }

}