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Cannot Connect To Database Server Java.lang.nullpointerexception
If you do have a real version, restart the client, log out and then back in. (make sure you've also transferred your account from minecraft to mojang at their site). Yes No Thanks for your feedback! Without opening the PHB, is there a way to know if it's a particular printing? share|improve this answer answered Nov 3 '11 at 13:11 Mechkov 3,2141921 add a comment| up vote 2 down vote You didnt initialize the connection con which you are calling when you're More about the author
Comment Add comment 10 |1200 characters needed characters left characters exceeded ▼ Viewable by all users Viewable by moderators Viewable by moderators and the original poster Advanced visibility Viewable by all IE: online-mode=false shades161, 8, 2015 #2 (You must log in or sign up to reply here.) Show Ignored Content Thread Status: Not open for further replies. Rating is available when the video has been rented. Log in or Sign up Bukkit Forums Home Forums > Bukkit > Bukkit Help > Problem/Bug Cant Connect To My Own Server IMPORTANT HELP Discussion in 'Bukkit Help' started by MCBro911, http://stackoverflow.com/questions/21389079/solved-java-lang-nullpointerexception-initializing-the-jdbc-mysql-connecti
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.Util.getInstance(Util.java:386) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927) at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2238) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2159) at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:792) at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native LoL Pro LoL Pro Dominate with Pro LoL guides. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I removed every plugin and it still happens it all started when I was using the ChatClear plugin and that plugin it has a command called /ccban which will ban a
stmt = con.createStatement(); ^ The connection is not initialized. You're talking about conn = DriverManager.getConnection(url,username,password); –Adarsh Singhal Jan 27 '14 at 19:13 Yes. RSS answers RSS answers and comments Who's following the question Related Questions Getting 'Installing Software' has encountered a problem when trying to install a connector. 2 Answers Problem in deploying project Many Thanks, Gayathri Comment Add comment 10 |1200 characters needed characters left characters exceeded ▼ Viewable by all users Viewable by moderators Viewable by moderators and the original poster Advanced visibility
Why are password boxes always blanked out when other sensitive data isn't? So instead of conn = DriverManager.getConnection ("jdbc:mysql://localhost:chatserver") try with this conn = DriverManager.getConnection ("jdbc:mysql://localhost:3306/chatserver") Complete connection string will look like below: DriverManager.getConnection("jdbc:mysql://localhost:3306/chatserver", "root", "root"); In above you can place your username, Please try again later. The nth numerator What is the simplest way to put some text at the beginning of a line and to put some text at the center of the same line?
No, create an account now. Since query was still null in your catch block, we know that it hadn't yet been set, and thus it must be the first one, so conn is null at that You gave me satisfactory solution & now everything is working fine –Adarsh Singhal Jan 27 '14 at 20:32 add a comment| up vote 0 down vote In your try block, you Comment Add comment 10 |1200 characters needed characters left characters exceeded ▼ Viewable by all users Viewable by moderators Viewable by moderators and the original poster Advanced visibility Viewable by all
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At lest for this purpose, use e.printStackTrace() –pcalcao Nov 3 '11 at 13:10 add a comment| 5 Answers 5 active oldest votes up vote 4 down vote accepted Connection con = In your original code, which you've now edited in response to the other answers, you set the value of query after you called conn.createStatement();. It wasn't accurate It wasn't clear It wasn't relevant Submit feedback Cancel Have a question about this article? http://electrictricycle.net/cannot-connect/cannot-connect-to-database-server-java.html Like this question?
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There exists a single statement between these two, and that is where you are getting your NPE. How safe is 48V DC? The easy way to locate a NullPointerException is to look for the line the stack trace indicates, and then look for the dots on the line. What do we call the initial text of the terminal?
Andrew Ruffolo 3,210 views 18:09 Exception in thread "main" java.lang.NoClassDefFoundError: FileName SOLVED ERROR javaerror - Duration: 5:52. Browse other questions tagged java mysql swing or ask your own question. Britec09 205,813 views 12:20 Java Tutorials - What is NullPointerException in Java - Duration: 3:02. http://electrictricycle.net/cannot-connect/cannot-connect-to-database-server-java-mysql.html Show more Language: English Content location: United States Restricted Mode: Off History Help Loading...
Can I switch from past tense to present tense in an epilogue? I see mohan bandaru found an issue with the DB URL now that the connector configuration is available. Giving up.) at com.atlassian.jira.upgrade.util.UpgradeUtils.tableExists(UpgradeUtils.java:128) at com.atlassian.jira.appconsistency.db.MinimumUpgradableVersionCheck.databaseSetup(MinimumUpgradableVersionCheck.java:49) ... RJG Gamers 136,379 views 9:02 14-Year-Old Prodigy Programmer Dreams In Code - Duration: 8:42.
What is really curved, spacetime, or simply the coordinate lines? This should be-Dfile.encoding=utf-8 Workaround The available workarounds are: Remove either the "sessionVariables" or "characterEncoding" parameters from the JDBC URL so they are not utilized at the same time. Can you post the relevant part of a stack trace? –Ian McLaird Jan 27 '14 at 19:19 | show 2 more comments 3 Answers 3 active oldest votes up vote 3 stmt = con.createstatement share|improve this answer answered Nov 3 '11 at 13:11 Rob 3,910112741 add a comment| up vote 0 down vote A little bit of debugging may help.
I have moved it as you told. If catch block is executing, why println(query) printing NULL java mysql swing share|improve this question edited May 17 '14 at 10:03 asked Jan 27 '14 at 18:47 Adarsh Singhal 113110 Working... You should add these two lines to initialize it: Driver d = (Driver)Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance(); con = DriverManager.getConnection("jdbc:microsoft:sqlserver://server:1433", "userName", "password"); share|improve this answer answered Nov 3 '11 at 13:13 Oleg Mikheev 9,45954276
Can you help me to fix it because it's executing catch() –Adarsh Singhal Jan 27 '14 at 19:27 The exception that is being thrown, likely from the line conn.createStatement(), You have to connect to DB in order to retrieve data. the url should be as below: jdbc:sqlserver://xxx:1433;databaseName=yyy;user=eeee;password=pwd the given configuration is for mysql server database connection url and database was ms-sql server, hope this resolves. i hope it will run smoothly..
Comment Add comment 10 |1200 characters needed characters left characters exceeded ▼ Viewable by all users Viewable by moderators Viewable by moderators and the original poster Advanced visibility Viewable by all Frame3.java is a result window that fetches content from DB. Loading...