ssh from one passwordless server to another passwordless server

[ndedhia1]

I am trying to connect from one server to another server.
The servers trust each other and do not have to use a password. I know that my code has a password in it right now, but the problem I am having is at the
ssh.connect(). I am getting this error:

null
[Ljava.lang.StackTraceElement;@84da23

I think that I have authentic a key from the server that I am trying to connect to but I am unsure how I am supposed to do that and am having trouble finding any code examples on that.
Please help

Thanks

     private void ftpFile(String actionType,String user,String password,String host,String remoteDirFile,String remoteFILE,String localeFile,String modeType) 
    {
     //modeType='a' for ascii || 'i' for binary
 
      if(actionType.equalsIgnoreCase("download"))  ///Download a file
      {
       try
       {
           System.out.println("YOU GOT TO FTPFILE");
           SshClient ssh = new SshClient();
           System.out.println("BEFORE CONNECT: " + host);
 
           ssh.connect(host, 22);
 
           System.out.println("BEFORE AUTHENTICATION");
         //Authenticate
           PasswordAuthenticationClient passwordAuthenticationClient = new PasswordAuthenticationClient();
           passwordAuthenticationClient.setUsername(user);
           passwordAuthenticationClient.setPassword(password);
 
           int result = ssh.authenticate(passwordAuthenticationClient);
           if(result != AuthenticationProtocolState.COMPLETE){
               System.out.println("Login to " + host + ":" + " " + user + "/" + password + " failed");
       }
         //Open the SFTP channel
           System.out.println("OPENING THE SFTP CHANNEL");
           SftpClient client = ssh.openSftpClient();
           System.out.println("TRYING TO SEND THE FILE");
         //Send the file
           client.get(remoteDirFile,localeFile);
           System.out.println("SENDING THE FILE");
           //disconnect
           client.quit();
           ssh.disconnect();
           System.out.println("DISCONNECTION FROM THE SSH");
 
//This ftp is used for ftping in CBOE and not over a network.  The above is used for secure ftp over a network
/*
          URL url = new URL("ftp://"+user+":"+password+"@"+host+".cboe.com:21/%2F"+remoteDirFile+";type="+modeType); 
          URLConnection conn = url.openConnection();
 
          PrintWriter ot = new PrintWriter(new FileWriter(localeFile));
          BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
          String line="";
 
          while((line = in.readLine()) != null)
          {
              ot.println(line);
          }
 
        ot.close();
        in.close();
*/
       }
       catch (MalformedURLException m)
       {
          System.out.println("YOU FAILED IN THE CONNECT11");
          System.out.println(" Error: "+m);
       }
       catch (IOException ioe)
       {
         System.out.println("YOU FAILED IN THE CONNECT");
         System.out.println(" Error: "+ioe);
 
         String weekDay = convertToValidWeekDay(determineValidWeekDay((new GregorianCalendar().get(Calendar.DAY_OF_WEEK + day--))));
 
         if(day < -7)
         {
           System.out.println(" No valid file(s) to "+actionType);
         }
 
         String remoteDirFile2="/infra/"+weekDay+"/prdgc2a/"+ remoteFILE;
         //ftpFile(actionType,user,password,host,remoteDirFile2,remoteFILE,localeFile,modeType);
       }
      }