Low Port Scanner : Port « Network « Java Tutorial

1. Java Tutorial
2. Network
3. Port

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

public class MainClass {

  public static void main(String[] args) {

    String host = "localhost";

    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) {
      }
    }
  }
}