Java connection failed with MySQL -

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• connect java mysql database 12 answers

i have created mysql database @ hostinger.co.uk , trying make connection between database , java application, , have written java code:

import java.sql.connection; import java.sql.drivermanager; import java.sql.preparedstatement; import java.sql.resultset;  public class db_connection {      public static void main(string arg[]) throws exception {         makeconnection("u335300563_myname", "pass12345");     }      public static void makeconnection(string username, string password) throws exception {         class.forname("com.mysql.jdbc.driver");         connection connection = drivermanager.getconnection("jdbc:mysql://u335300563_database",username,password);           preparedstatement statement = connection.preparestatement("select * example");          resultset result = statement.executequery();         for(int i=1; result.next(); i++)             system.out.println(result.getstring(i));     } } 

but throwing exception is:

exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.communicationsexception: communications link failure  last packet sent server 0 milliseconds ago. driver has not received packets server.     @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance(unknown source)     @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(unknown source)     @ java.lang.reflect.constructor.newinstance(unknown source)     @ com.mysql.jdbc.util.handlenewinstance(util.java:377)     @ com.mysql.jdbc.sqlerror.createcommunicationsexception(sqlerror.java:1036)     @ com.mysql.jdbc.mysqlio.<init>(mysqlio.java:338)     @ com.mysql.jdbc.connectionimpl.coreconnect(connectionimpl.java:2232)     @ com.mysql.jdbc.connectionimpl.connectonetryonly(connectionimpl.java:2265)     @ com.mysql.jdbc.connectionimpl.createnewio(connectionimpl.java:2064)     @ com.mysql.jdbc.connectionimpl.<init>(connectionimpl.java:790)     @ com.mysql.jdbc.jdbc4connection.<init>(jdbc4connection.java:44)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance(unknown source)     @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(unknown source)     @ java.lang.reflect.constructor.newinstance(unknown source)     @ com.mysql.jdbc.util.handlenewinstance(util.java:377)     @ com.mysql.jdbc.connectionimpl.getinstance(connectionimpl.java:395)     @ com.mysql.jdbc.nonregisteringdriver.connect(nonregisteringdriver.java:325)     @ java.sql.drivermanager.getconnection(unknown source)     @ java.sql.drivermanager.getconnection(unknown source)     @ db_connection.makeconnection(db_connection.java:14)     @ db_connection.main(db_connection.java:9) caused by: java.net.unknownhostexception: u335300563_database     @ java.net.inet6addressimpl.lookupallhostaddr(native method)     @ java.net.inetaddress$1.lookupallhostaddr(unknown source)     @ java.net.inetaddress.getaddressesfromnameservice(unknown source)     @ java.net.inetaddress.getallbyname0(unknown source)     @ java.net.inetaddress.getallbyname(unknown source)     @ java.net.inetaddress.getallbyname(unknown source)     @ com.mysql.jdbc.standardsocketfactory.connect(standardsocketfactory.java:190)     @ com.mysql.jdbc.mysqlio.<init>(mysqlio.java:297)     ... 16 more 

so please tell problem?

caused by: java.net.unknownhostexception: u335300563_database

program failed identify host of mysql db.

in program, have pass correct hostname or ip address of system hosted mysql:

following line need correct

drivermanager.getconnection("jdbc:mysql://u335300563_database"                              ,username,password); 

to

drivermanager.getconnection("jdbc:mysql://<ip address of mysql db server or correct hostname port number >",                             username,password);