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From: Christian Denning <ChristianDenning@netscape.net>
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Subject: Re: Linux/Postgres 6.5 problems using jdbc w/jdk1.2
Date: Thu, 02 Sep 1999 14:08:28 +0100
Organization: RemarQ http://www.remarQ.com
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Your database url is wrong. A postgres database needs the following URL:
jdbc:postgresql://theComputerName/thePostgresDatabaseName
if you omit something, you get your NullPointerException

Christian

EA wrote:
> 
> Here are the errors I get while running the example classes provided by
> Postgres:
> 
> 1.  Without Debug
> <---------------------------------------------------
> PostgreSQL basic test v6.3 rev 1
> 
> Connecting to Database URL = jdbc:postgresql:db1
> Exception caught.
> Something unusual has occured to cause the driver to fail. Please report
> this exception: {1}
> Something unusual has occured to cause the driver to fail. Please report
> this exception: {1}
>  at postgresql.Driver.connect(Compiled Code)
>  at java.sql.DriverManager.getConnection(Compiled Code)
>  at java.sql.DriverManager.getConnection(Compiled Code)
>  at example.basic.<init>(Compiled Code)
>  at example.basic.main(Compiled Code)
> <-----------------------------------------------------
> 2.  With Debug
> <---------------------------------------------------
> PostgreSQL basic test v6.3 rev 1
> 
> DriverManager.initialize: jdbc.drivers = null
> JDBC DriverManager initialized
> registerDriver:
> driver[className=postgresql.Driver,postgresql.Driver@a574f633]
> Connecting to Database URL = jdbc:postgresql:web
> DriverManager.getConnection("jdbc:postgresql:db1")
>     trying driver[className=postgresql.Driver,postgresql.Driver@a574f633]
> -- listing properties --
> password=start123
> user=db1
> PGDBNAME=db1
> Protocol=postgresql
> Using postgresql.jdbc2.Connection
> Exception caught.
> java.lang.NullPointerException
> java.lang.NullPointerException
>  at java.io.Writer.write(Compiled Code)
>  at java.io.PrintStream.write(Compiled Code)
>  at java.io.PrintStream.print(Compiled Code)
>  at java.io.PrintStream.println(Compiled Code)
>  at java.lang.Throwable.printStackTrace(Compiled Code)
>  at java.sql.SQLException.<init>(Compiled Code)
>  at postgresql.util.PSQLException.<init>(Compiled Code)
>  at postgresql.Driver.connect(Compiled Code)
>  at java.sql.DriverManager.getConnection(Compiled Code)
>  at java.sql.DriverManager.getConnection(Compiled Code)
>  at example.basic.<init>(Compiled Code)
>  at example.basic.main(Compiled Code)
> 
> <-----------------------------------------------------
> 
> Anyone recognize these errors.
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