Similar Questions

• Connect to the Oracle database - does not connect

  I am new to JAVA and for the first time that I am trying to connect to an Oracle using JAVA data. Well, I get an error when you try to connect to the database. I can see that the error doesn't that make strings passed to make the databases of connection are NULL. Thus, an error (see error below).
  
  Question
  How is the 'connection' varriable is NULL?
  It seems that the hold 'try' session was not executed. This session is broken?
  
  ERROR
  
  The database connection is not found: null
  Database connection before call: null
  Exception in thread "main" java.lang.NullPointerException
  at TestOCIApp.main (TestOCIApp.java:39)
  
  
  = JAVA START program =.
  
  import java.sql. *;
  import java.sql.Connection;
  to import java.sql.DriverManager;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.sql.Statement;
  
  public class TestOCIApp {}
  
  Public Shared Sub main (string args []) throws ClassNotFoundException,
  SQLException {}
  
  Fitting out = null;
  try {}
  Load the JDBC driver
  String driverName = "oracle.jdbc.driver.OracleDriver";
  Class.forName (driverName);
  
  Create a connection to the CCM PROD database
  String serverName = "192.168.2.144";
  String portNumber = "1521;
  String sid = "op01ccdb01";
  String url = "JDBC: thin: @" + serverName + ":" + portNumber + ":" + sid;
  String username = 'user id ';
  String password = "password";
  connection = DriverManager.getConnection (url, username, password);
  System.out.println ("connection value:" + connection);
  
  } catch (ClassNotFoundException e) {}
  The database driver is not found
  System.out.println ("could not find the connection to database:" + connection);
  } catch (SQLException e) {}
  Could not connect to the database
  System.out.println ("could not connect to the database connection:" + connection);
  }
  
  System.out.println ("connection to the base before the call:" + connection);
  Statement stmt = connection.createStatement ();
  ResultSet rset = stmt.executeQuery ("select" driver Tester Hello OIC ' |) THE USER: '! ("' result from double ');
  While (rset.next ())
  System.out.println (RSet.GetString (1));
  RSet.Close ();
  stmt. Close();
  Connection.Close;
  }
  }
  
  
  = END of JAVA program =.

  The try section runs very well but only partially because you get the exception "ClassNotFoundException", which means that it is impossible to load the Oracle driver class (so it does not reach the line where it says):

  Class.forName(driverName);
  

  You intercept this exception and then simply print a line "could not find the database connection: null". Then you let the code continue, obviously without you still initialize your variables.

  I would recommend rewriting those catch blocks throw new RuntimeException so that the code will not continue any further when an error is detected in the try or don't catch not all of them if you donot want to manage them appropriately.

  As for your problem, you probably have not added the ojdbc14.jar is to your project, and this is why it cannot find the class OracleDriver.

  Finally, try adding {noformat}

  {noformat} around your code when you post code.  It makes it a lot more readable.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
  

• Error: 0: the database does not accept a connection

  Hello

  We have EMP 11.1.2.1 and EAS worked very well. We applied successfully patches of SAE 13904635 and 13904640.

  However, after you apply the patch, we received the error

  Error: 0: the database does not accept a connection

  For example, when connect us to EAS and click the EssbaseCluster1 under "Essbase Server" node we don't get something, like the list of application as such. We just get the error log.

  What could be the problem, is there anything, we had to do after you apply the hotfix?

  The essbase server seems to be running so we can pull the reports in the workspace and all.

  Thanks for all the answers.

  Have a read of the following Oracle Support doc - "impossible to add or connect to an Essbase server in Essbase Administration Services (EAS):" error: 0 in Essbase Administration Services: the database does not accept a connection "or" "error: 105: Login with token at MaxlJni" "(Doc ID 1469492.1).

  See you soon

  John

  http://John-Goodwin.blogspot.com/

• HP Slate 7 more does not connect to iPhone personal hotspot

  My new tablet, slate 7 more, c. 4.2.2 kernel v. 3.1.10 - g2630132 does not connect to my iPhone 4, ios 7.0.6.

  The Tablet works fine on wifi router database connections.

  The Tablet sees different iPhones when the personal hotspots are active on these phones and I can enter the security keys.  The Tablet shows "signal strength Excellent and"WPA2 PSK security."  However when I press "Connect" the Tablet shows the hotspot iPhone simply as 'Saved, secure with WPA2.'  The Tablet does not actually connect.

  My goal by purchasing this tablet had a portable device that I could work out my phone personal hotspot.

  Suggestions, or can someone point me to a FAQ tip or tech that I might have missed?

  Thank you.

  Hello

  I was able to connect to Iphone 4S my son without problem.

  I had to make sure I typed the passkey precisely, and by clicking on the check box "Show characters" did help.

  I've seen some messages on the internet where there is Android devices connection problems if the phone name had special characters in it, but we still managed using a name such as "batman Iphone 4»

  You can also make sure there is no special characters in the name just to be safe.

• sdsql does not connect and does not give any useful diagnostic.

  What is the point of sdsql?     It does not connect, it gives no clue as to why, and it doesn't seem to be any documentation.

  < pre >

  C:\users\smi425 > sdsql compare/xxxxxxxxx@nf04xod1

  sdsql: version 4.1.0 Beta Wed Dec 17 12:50:46 2014

  Copyright (c) 1982, 2014, Oracle.  All rights reserved.

  Error at startup on line: 0 in command.

  connect compare/xxxxxxxxx@nf04xod1

  Error report-

  Failed connection

  C:\users\smi425 >

  [/pre]

  < pre >

  sdsql: version 4.1.0 Beta Wed Dec 17 12:52:50 2014

  Copyright (c) 1982, 2014, Oracle.  All rights reserved.

  User name? (''?) sm425

  Password? (**********?) *********

  Database? (''?) nf04xod1

  Error at startup on line: 0 in command.

  connect

  Error report-

  Login failed, try again up to 3 times

  User name? (RETRYING) ("sm425"?)

  Password? (RETRYING) (**********?)

  Database? (RETRYING) ("nf04xod1"?)

  December 17, 2014 getConnection oracle.dbtools.raptor.newscriptrunner.SQLPLUS 12:53:17

  SEVERE: 1

  Error at startup on line: 0 in command.

  connect

  Error report-

  Login failed, try again up to 3 times

  User name? (RETRYING) (''?)

  Password? (RETRYING) (**********?)

  Database? (RETRYING) (''?)

  December 17, 2014 getConnection oracle.dbtools.raptor.newscriptrunner.SQLPLUS 12:53:20

  SEVERE: 1

  Error at startup on line: 0 in command.

  connect

  Error report-

  Login failed, try again up to 3 times

  December 17, 2014 getConnection oracle.dbtools.raptor.newscriptrunner.SQLPLUS 12:53:22

  SEVERE: 1

  Error at startup on line: 0 in command.

  connect

  Error report-

  Failed connection

  < / pre >

  There were some failures of quality team of SQL Developer over the years, but it beats hands down.

  Hey Jim,.

  Download the latest version of SQLcl page EA 4.1 and look at my blog on LDAP.  Turloch wired this up and we rev produced today.

  Barry McGillin: SQLCl - LDAP anyone?

  I would like to know if it works for you. (or gives you a better error this time)

  Thank you

  B

• Dreamweaver does not connect to the localhost server

  Hi, I'm pretty new to CS5 and have been learning mainly the CS5 Bible.

  I use an Imac under Snow Leopard.

  Downloaded MAMP and installed ok - start page display and the States servers works ok.

  File server root is the user/Applications/MAMP/htdocs

  have copied the Techniques folder in the tutorial in this folder and have imported the included database in myphpadmin and everything seems ok

  Go to configure the site server, following the instructions in the book, and this is then I try to connect to the database.

  Dreamweaver won't give the following error message.

  

  It seems that I am without mapping to the right folder. I guess I should be reviewed in the htdocs folder, but it does not connect.

  Can anyone help please with a speech through this configuration.

  Thank you very much.

  NottsPizza

  You use the default MAMP ports or have you go to the preferences and set the default value of Apache/mySQL?  If you left on the default MySQL port is "8889" which means that your mySQL would read 'localhost:8889' because otherwise DW research only on the default port.  Everything seems in order.

• App store, Safari and iTunes does not connect to the Internet after installing macOS Sierra

  App store, Safari and iTunes does not connect to the Internet after installing macOS Sierra

  After upgrade 'OS X El Capitan' to "macOS Sierra" window only empty "App store" and page "Safari" made its appearance, no error message shows. store "iTunes" and "Dictionary" does not connect too.

  But Google chrome works well.

  So have you tried the next steps in your original post that Safari does not work after installing macOS Sierra:

  (1) x OS: "Unable to connect" or "unable to connect to the App Store. An internet connection is required"- Apple Support

  2) Advanced the steps to correct the problems with the iTunes Store - Apple Support connection

• Messages does not connect to the Yahoo IM account?

  Messages app v9.2, currently works very well with my Google account and iMessage, also worked with my Yahoo Messenger account, but recently (today?) does not connect to it.

  I know that Yahoo has made changes to their Instant Messaging System. This change affected only Messages?

  Hello

  I can't connect either (I didn't realize that I do not use)

  However going on the Yahoo Site and change the password does nothing.

  With the help of their option 'insecure Apps' does nothing no more (there was an email saying I was using access to messaging through an unsafe application - but I have not used their messaging service for a very long time.)

  It does say read more suggests, is not Mail (after OS X 10.9 is OK)

  He does not on access to their e-mail service.

  There is no option in Messages to try to activate disable SSL you can with AIM or Jabber accounts

  I have looked in the help (a little) but still found nothing.

  

  20:49 Tuesday. October 4, 2016

   iMac 2.5 Ghz i5 2011 (El Capitan)
   G4/1GhzDual MDD (Leopard 10.5.8)
   MacBookPro (Snow Leopard 10.6.8) 2 GB
   Mac OS X (10.6.8).
   iPhone and iPad (2)

• iPhone 5 sec Bluetooth does not connect

  My 5s Bluetooth iphone works fine one day, the next day it does not connect to my Boise, helmet or Fitbit.   My Bluetooth is on, I have it enabled or disabled and you have rebooted my phone.  I have updated to IOS 10.0.2.

  I was able to pair with my ipad.

  Hello

  Try the procedure described in this article to support > get help to connect a Bluetooth device accessory with your iPhone, iPad or iPod touch - Apple Support

• Bluetooth does not connect on iOS 10 and sierra OS

  I just bought an iphone 7, Apple Watch 2 and I updated my computer to sierra yesterday.

  I wanted to do the auto unlock with my watch, but my phone does not connect to the Mac with bluetooth. He wants to connect and the phone is displayed in the bluetooth settings, it says on my phone to pair if the numbers are the same, and then he "fails to connect. so im lost and I can't use my watch.

  I have reset my watch (by unpairing), iphone (by resetting all settings) and rebooted my computer.

  It seems that the "it just works era" is over for apple.

  If misery loves company, I'm here!  Just posted my new iphone 7 + setting BLUETOOTH is not 'discover' one of my devices (in 2015 Lexus and Bose radio/speakers).  In addition my iPad and iPad air are also not 'discover' devices!  I think that this happened once I installed the latest ios 10.0.2 software on all my devices.  Please reply if you receive some 'advice' from someone in the "know"!  Thank you!

• I just got a new modem (Arris SB6190) and now my Airport Extreme does not connect.  It worked fine with the previous modem (a rented one TWC).  Help!

  I just got a new modem (Arris SB6190) and now my Airport Extreme does not connect.  It worked fine with the previous modem (a rented one TWC).  Help!

  Always recommended to reset the airport back to settings by default and then set up again whenever you have a new modem or change your Internet Service provider.

  Turn off the new modem for at least 30 minutes. More is better.

  Perform a hard reset on the AirPort Extreme, then it turned off.

  Make sure that the Ethernet cable connects the modem to the "O" on the AirPort Extreme WAN port

  After the power of the modem 30 minutes down, turn on the modem and let it run for at least 5 minutes by itself.

  Then, turn on the airport and let it run a few minutes

  Set up AirPort Extreme again

  Important note... There are many reports of problems with the modem Arris SB and airports. Both are great products, but they do seem to work perfectly together for some users.

• Thunderbird does not connect with the server

  Another recent problem is Thunderbird does not connect with the server. I don't know if sent mail will go out, but I know I'm nothing receive. My internet connection works well for FF or another browser. I checked my settings and they seem OK. I checked the default settings in Win10x64 and they are correct. Any ideas?

  Although windows 10 is new for us all. How do solve you. I have other solution with very similar issues.

• IMAP e-mail accounts does not connect

  Just recently my iCloud, Gmail and Outlook IMAP accounts does not connect through the app Apple Mail on my MacBook Pro running 10.11.6. I get a popup error message and exclamation points appear next to each account that States the unable to connect to the server application. IPhone & iPad with the same accounts are fine, just my Macbook Pro has this problem. Connection Internet is fine. Suggestions?

  Please read If you cannot send or receive e-mails on your Mac - Apple Support.

• Does not connect with the e-mail server after update.

  Thunderbird ran an auto update yesterday. Then it just stopped working. It does not connect with the Comcast email server. An error message appears "Unable to connect" and "the connection was refused when attempting to contact live.mozilla.messaging.com. I don't want to uninstall and reinstall for fear of losing my emails and address book. How can we get Thunderbird set, there is no tool in the toolbar to enable the debugging and correction of program errors.

  I use Thunderbird version 38.1.0.

  Thank you.

  The problem solved itself, Thunderbird has just started working. I followed the thread suggested by Christ1 and found none of it applied. No malware, no browser, no certificate error security block. I did, however, in Thunderbird, under Tools/Options/General uncheck the button for "When Thunderbird launches, show the Start Page in the message box." I do know that if this helped, Thunderbird still do not access Comcast mail for hours after that, even with several stops and restarts.

  Until the next problem...

• My UK 6s iPhone does not connect to the network in Germany?

  My UK 6s iPhone does not connect to the network in Germany?

  'The network '? Which network? WiFi or cell phone? And what have you already tried to get connected?