Determine if Connected and Logged On

The IsConnected property indicates whether or not the FTP component has a valid TCP/IP connection (and is logged on) to the FTP server.

Download Chilkat Java Library

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkFtp2 ftp = new CkFtp2();

    boolean success;

    //  Any string unlocks the component for the 1st 30-days.
    success = ftp.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
    }

    ftp.put_Hostname("ftp.chilkatsoft.com");
    ftp.put_Username("mylogin");
    ftp.put_Password("mypassword");

    //  Connect and login to the FTP server.
    success = ftp.Connect();
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
    }

    //  ...

    //  At any point in an FTP session, the IsConnected property
    //  can be checked to determine if the component has remained
    //  connected to the FTP server.
    if (ftp.get_IsConnected() == true) {
        System.out.println("Connected!");
    }
    else {
        System.out.println("Not connected!");
    }

    //  ...

    ftp.Disconnect();
  }
}