[Dreamwalker]

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(); } } }

[Deque]

Adhere to the Java coding conventions: Take care for proper intendation, put each statement on a new line, use correct variable names:

this_is_not_a_java_variable
butThisIs

Use a map for the port-to-name mappings or at least a switch case statement, which looks much cleaner than an if-else-if-... construction.

Why do you use a thread?

[Dreamwalker]

Adhere to the Java coding conventions: Take care for proper intendation, put each statement on a new line, use correct variable names:

this_is_not_a_java_variable
butThisIs

Use a map for the port-to-name mappings or at least a switch case statement, which looks much cleaner than an if-else-if-... construction.

Why do you use a thread?

It's something I wrote in 5 mins and is sufficient for what I needed... and the extra thread was to create a seperate stack memory on the scan for stability and speed.

[Deque]

Adhere to the Java coding conventions: Take care for proper intendation, put each statement on a new line, use correct variable names:

this_is_not_a_java_variable
butThisIs

Use a map for the port-to-name mappings or at least a switch case statement, which looks much cleaner than an if-else-if-... construction.

Why do you use a thread?

It's something I wrote in 5 mins and is sufficient for what I needed... and the extra thread was to create a seperate stack memory on the scan for stability and speed.

Well, you published it.
Also the conventions are something you should make a habit of, so you don't even have to think about them, 5 minutes or not.
Using a single thread for stability and speed doesn't make sense at all. If you used several threads it would probably be of some use for the speed, but not like this.

[Ex094]

You should really consider posting in some working screen shots of your program