java - unknown database in jdbc -


i using jdbc , new it. keep getting runtime exception:

   connecting psysical database...    com.mysql.jdbc.exceptions.jdbc4.mysqlsyntaxerrorexception: unknown database 'kholofelodb' @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method) @ sun.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:57) @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:45) @ java.lang.reflect.constructor.newinstance(constructor.java:525) @ com.mysql.jdbc.util.handlenewinstance(util.java:411) @ com.mysql.jdbc.util.getinstance(util.java:386) @ com.mysql.jdbc.sqlerror.createsqlexception(sqlerror.java:1052) @ com.mysql.jdbc.mysqlio.checkerrorpacket(mysqlio.java:3609) @ com.mysql.jdbc.mysqlio.checkerrorpacket(mysqlio.java:3541) @ com.mysql.jdbc.mysqlio.checkerrorpacket(mysqlio.java:943) @ com.mysql.jdbc.mysqlio.secureauth411(mysqlio.java:4113) @ com.mysql.jdbc.mysqlio.dohandshake(mysqlio.java:1308) @ com.mysql.jdbc.connectionimpl.coreconnect(connectionimpl.java:2336) @ com.mysql.jdbc.connectionimpl.connectonetryonly(connectionimpl.java:2369) @ com.mysql.jdbc.connectionimpl.createnewio(connectionimpl.java:2153) @ com.mysql.jdbc.connectionimpl.<init>(connectionimpl.java:792) @ com.mysql.jdbc.jdbc4connection.<init>(jdbc4connection.java:47) @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method) @ sun.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:57) @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:45) @ java.lang.reflect.constructor.newinstance(constructor.java:525) @ com.mysql.jdbc.util.handlenewinstance(util.java:411) @ com.mysql.jdbc.connectionimpl.getinstance(connectionimpl.java:381) @ com.mysql.jdbc.nonregisteringdriver.connect(nonregisteringdriver.java:305) @ java.sql.drivermanager.getconnection(drivermanager.java:579) @ java.sql.drivermanager.getconnection(drivermanager.java:221) @ com.psybergate.database.simblecode.main(simblecode.java:22)

here gave code

try {             string connectionurl =      "jdbc:mysql://localhost:3306/kholofelodb";             class.forname("com.mysql.jdbc.driver");              system.out.println("connecting psysical database...");             connection conn = drivermanager.getconnection(connectionurl, user,                     pass);              statement statement = conn.createstatement();             system.out.println("connection has been made");              scanner keyboardscanner = new scanner(system.in);             system.out.println("enter table name:");             string tablename = keyboardscanner.nextline();              system.out.println("creating table...");             statement.executequery("create table " + tablename                     + " (name , age ,salary)");             system.out.println("table created");             system.out.println("inserting data table ...");             statement.executeupdate("insert " + tablename                     + "values (kholofelo , 21 , 9969696)");         }

how code work? beginner jdbc....

for above code; pass = "passowrd", user = "root"

i had problem port fixed through site

thanks lot

please check in mysql database whether database name 'kholofedb' existed or not

i think haven't created

please check once if no create , related tables


Comments

Post a Comment

Popular posts from this blog

monitor web browser programmatically in Android? -

i've got tricky question here. need users make payment bank (namely barclaycard) in uk. so, have https url , add parameters (such amount pay, order reference, etc) url, start http connection intent.actionview, redirect user browser can enter credit card details on bank's webpage , make payment our account successfully. far ? the code use below (i changed values privacy reasons) problem is, need app when user has completed/failed/cancelled payment. barclaycardautomatically redirects particular url when payment has succeeded, 1 if failed. there no way of knowing when barclaycard payment has succeeded go android app somehow ? button cardbutton = (button) findviewbyid(r.id.card_button); cardbutton.setonclicklistener(new view.onclicklistener() { @override public void onclick(view arg0) { string prehashstring = new string(); string prohashstring = new string(); string shapassphrase = new string(); shapassphrase = "gsvth£h70zkh...
Read more

Shrink a YouTube video to responsive width -

i have youtube video embedded on our website , when shrink screen tablet or phone sizes stops shrinking @ around 560px in width. standard youtube videos or there can add code make go smaller? you can make youtube videos responsive css. wrap iframe in div class of "videowrapper" , apply following styles: .videowrapper { float: none; clear: both; width: 100%; position: relative; padding-bottom: 56.25%; padding-top: 25px; height: 0; } .videowrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } the .videowrapper div should inside responsive element. padding on .videowrapper necessary keep video collapsing. may have tweak numbers depending upon layout.
Read more

wpf - PdfWriter.GetInstance throws System.NullReferenceException -

i'm trying create pdf document using itextsharp 5.3.4 using following document document = new document(); filestream stm = new filestream(filename, filemode.create); pdfwriter writer = pdfwriter.getinstance(document, stm); i'm getting system.nullreferenceexception following stack trace: system.nullreferenceexception occurred hresult=-2147467261 message=la référence d'objet n'est pas définie à une instance d'un objet. source=itextsharp stacktrace: à itextsharp.text.version.getinstance() innerexception: i've verified neither document nor stm null, , if select "continue" in vs12 document created - exception thrown. updated itextsharp 5.4.0 , it's still occurring. can't find information on anywhere - got ideas? make sure not catching exceptions. nullreferenceexception can 1 caught , handled inside itextsharp, don't care it. fact can continue supports theory. change following setting verify: debug -> exceptions ...
Read more