Connecting to MySQL from another machine.

I use following code to connect to my database.it works
String databaseUrl = "jdbc:mysql://localhost:3306/test";
but when i use
String databaseUrl = "jdbc:mysql://192.168.0.205:3306/test";{
it gives error (192.168.0.205 being my ip address)
error
message from server : "Host TRAIN5" is not allowed to connect to this MySQL server.
Is that because of my connection string?

It is because of your configuration. It has to do with user permission.
Read the MySQL manual, again (you have read it, haven't you?), and pay close attention to user administration and the "GRANT" statement.

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    But I don't know why.
    Please Why?
    Below there are the fragment of errors, servlet code e javabean code.
    Thank you.
    Zovao.
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    java.lang.NullPointerException
    at CadServletFileBeanConexArq.doPost(CadServletFileBeanConexArq.java:47)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
    Note: The line 47 is calling insertIntoDB javabean method.
    ========///////////////===============
    // Here is the servlet CadServletFileBeanConexArq.java
    import javax.servlet.*;
    import javax.servlet.http.*;
    import java.util.*;
    import java.sql.*;
    import conJdbc.*;
    public class CadServletFileBeanConexArq extends HttpServlet {
    public ConexPed connect = null;
    private String driver = "com.mysql.jdbc.Driver";
    private String URL = "jdbc:mysql://localhost:3306/cadastro";
    public void init( ServletConfig config )
    throws ServletException
    super.init( config );
    try
    connect = new ConexPed(driver, URL, "monty", "some_pass");
    catch ( Exception e )
    e.printStackTrace();
    connect = null;
    public void doPost( HttpServletRequest req,
    HttpServletResponse res )
    throws ServletException
    boolean success = true;
    String email, nome, sobrenome, produto, valor;
    email = req.getParameter( "Email" );
    nome = req.getParameter( "Nome" );
    sobrenome = req.getParameter( "Sobrenome" );
    produto = req.getParameter( "Produto" );
    valor = req.getParameter( "Valor" );
    res.setContentType( "text/html" );
    if ( email.length() > 0 && nome.length() > 0 && sobrenome.length() > 0 && valor.length() > 0 )
    /* inserting data */
    success = connect.insertIntoDB(
    "'" + email + "','" + nome + "','" + sobrenome + "','" + produto + "'", Double.parseDouble(valor) );
    //closing connection
    public void destroy()
    connect.fecharConexao();
    =============///////////////============
    Here is the JavaBean.
    package conJdbc;
    import java.sql.*;
    public class ConexPed
    public Connection connection;
    public Statement statement;
    public ConexPed (String driver, String urlServidor, String user, String password)
    try
    Class.forName(driver);
    connection = DriverManager.getConnection(urlServidor,user,password);
    catch (ClassNotFoundException ex)
    System.out.println("N�o foi poss�vel encontrar a classe do Driver: " + driver);
    catch (SQLException ex)
    System.out.println("N�o foi poss�vel conectar ao servidor");
    try
    statement = connection.createStatement();
    catch (SQLException ex)
    System.out.println("N�o foi poss�vel criar a statement");
    *Inserting data to database
    public synchronized boolean insertIntoDB( String stringtoinsert, double valor)
    try
    statement.executeUpdate( "INSERT INTO pedido values (" + stringtoinsert + " , " + valor + ");" );
    catch ( Exception e ) {
    System.err.println(
    "ERROR: Problemas ao adicionar nova entrada" );
    e.printStackTrace();
    return false;
    return true;
    * Close statement.
    public void fecharStatement()
    try
    statement.close();
    catch (SQLException ex)
    ex.printStackTrace();
    * close database
    public void fecharConexao()
    try
    connection.close();
    catch (SQLException ex)
    ex.printStackTrace();
    }

    Hi,
    I'm new here and beginner on java to.
    I have problem to connect to MySql database, by a connection javabean.
    It's the following: a HTML page calls a servlet and this servlet imports the package connection javabean.
    It has no problem when I establish the connection inside the servlet, with all its methods (public and private). But i want to separate the code connection from servlet.
    Detail: there is no problem, using the javabean to connect to MS Access database.
    I put "mysql-connector-java-3.1.12-bin.jar" file inside WEB-INF/lib application and common/lib directories.
    I set the classpath:
    SET CLASSPATH=%CATALINA_HOME%\COMMON\LIB\mysql-connector-java-3.1.12-bin.jar;%CLASSPATH%
    I think that the servlet cannot create an instance of javabean, because passed by catch exception of the servlet init method.
    But I don't know why.
    Please Why?
    Below there are the fragment of errors, servlet code e javabean code.
    Thank you.
    Zovao.
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    java.lang.NullPointerException
    at CadServletFileBeanConexArq.doPost(CadServletFileBeanConexArq.java:47)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
    Note: The line 47 is calling insertIntoDB javabean method.
    ========///////////////===============
    // Here is the servlet CadServletFileBeanConexArq.java
    import javax.servlet.*;
    import javax.servlet.http.*;
    import java.util.*;
    import java.sql.*;
    import conJdbc.*;
    public class CadServletFileBeanConexArq extends HttpServlet {
    public ConexPed connect = null;
    private String driver = "com.mysql.jdbc.Driver";
    private String URL = "jdbc:mysql://localhost:3306/cadastro";
    public void init( ServletConfig config )
    throws ServletException
    super.init( config );
    try
    connect = new ConexPed(driver, URL, "monty", "some_pass");
    catch ( Exception e )
    e.printStackTrace();
    connect = null;
    public void doPost( HttpServletRequest req,
    HttpServletResponse res )
    throws ServletException
    boolean success = true;
    String email, nome, sobrenome, produto, valor;
    email = req.getParameter( "Email" );
    nome = req.getParameter( "Nome" );
    sobrenome = req.getParameter( "Sobrenome" );
    produto = req.getParameter( "Produto" );
    valor = req.getParameter( "Valor" );
    res.setContentType( "text/html" );
    if ( email.length() > 0 && nome.length() > 0 && sobrenome.length() > 0 && valor.length() > 0 )
    /* inserting data */
    success = connect.insertIntoDB(
    "'" + email + "','" + nome + "','" + sobrenome + "','" + produto + "'", Double.parseDouble(valor) );
    //closing connection
    public void destroy()
    connect.fecharConexao();
    =============///////////////============
    Here is the JavaBean.
    package conJdbc;
    import java.sql.*;
    public class ConexPed
    public Connection connection;
    public Statement statement;
    public ConexPed (String driver, String urlServidor, String user, String password)
    try
    Class.forName(driver);
    connection = DriverManager.getConnection(urlServidor,user,password);
    catch (ClassNotFoundException ex)
    System.out.println("N�o foi poss�vel encontrar a classe do Driver: " + driver);
    catch (SQLException ex)
    System.out.println("N�o foi poss�vel conectar ao servidor");
    try
    statement = connection.createStatement();
    catch (SQLException ex)
    System.out.println("N�o foi poss�vel criar a statement");
    *Inserting data to database
    public synchronized boolean insertIntoDB( String stringtoinsert, double valor)
    try
    statement.executeUpdate( "INSERT INTO pedido values (" + stringtoinsert + " , " + valor + ");" );
    catch ( Exception e ) {
    System.err.println(
    "ERROR: Problemas ao adicionar nova entrada" );
    e.printStackTrace();
    return false;
    return true;
    * Close statement.
    public void fecharStatement()
    try
    statement.close();
    catch (SQLException ex)
    ex.printStackTrace();
    * close database
    public void fecharConexao()
    try
    connection.close();
    catch (SQLException ex)
    ex.printStackTrace();
    }

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