Re: problem with serialization

Hi Dave,

The code is very small. It is just a test :

/*
* Java sample program
*/

import java.io.*;
import java.sql.*;
import org.postgresql.util.Serialize;

public class lili implements Serializable
{

String myString;
int myNumber;

public lili() throws ClassNotFoundException,
FileNotFoundException, IOException, SQLException
{

myString="theString";
myNumber=4;
}

private void testmethod(){};
public void testmethod2x(){};

public static void main(String args[])
{
try {
lili mylili = new lili();
Class.forName("org.postgresql.Driver"); // load
database interface

// connect to the database
org.postgresql.Connection conn =
(org.postgresql.Connection)DriverManager.getConnection("jdbc:postgresql://localhost:5432/onlinechess",
"postgres", "mypassword"); // works
// test of serialisation
org.postgresql.util.Serialize.create(conn, mylili); // makes
problems

} catch(Exception exc)
{
System.err.println("Exception caught.\n" + exc);
exc.printStackTrace();
}
}
}

Dave Cramer wrote:

> Chris,
>
> Can you send us your code. Or a snippet?
>
> Dave
>

>
> Hi! I am new here.
>
> I did a small test to try object serialization with the
> org.postgresql.util.Serialize class.
>
> I get the following exception when I try to use the at
> org.postgresql.util.Serialize.create Method. :
>
> java.lang.NullPointerException
> at org.postgresql.jdbc2.ResultSet.getString(ResultSet.java:148)
> at org.postgresql.util.Serialize.create(Serialize.java:241)
> at org.postgresql.util.Serialize.create(Serialize.java:220)
>
> I looked at create in Serialization.java and saw that
> the exception occurs at getString although I have no table corresponding
> to the class I want to serialize.
> if(!rs.next()){
> // String lolo=rs.getString(1);}
> }
>
> Although the resultset is empty (because the table is absent) , why
> getString has been run ?
>
> Can you help me ?
>
> Chris
>
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