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java.lang.NullPointerException

From: "Kevin W(dot) Nikiforuk" <kwn(at)sethanon(dot)remote(dot)ualberta(dot)ca>
To: pgsql-general(at)postgresql(dot)org
Subject: java.lang.NullPointerException
Date: 1998-05-20 19:09:22
Message-ID: Pine.LNX.3.95.980520125601.5353A-100000@sethanon (view raw or flat)
Thread:
Lists: pgsql-general
-----BEGIN PGP SIGNED MESSAGE-----

Forgive me if this is the wrong mailing list for this, but it seemed the
most appropriate.

I've got a database up and running under PostgreSQL called kwn.  When I
try to use the following Java code to connect to it:

    try {
      Class.forName("postgresql.Driver");
    }
    catch (Exception e) {
      System.out.println(e);
    }

    postgresql.Connection conn = null;

    try {
      conn =
(postgresql.Connection)DriverManager.getConnection("jdbc:postgresql:kwn");
    }
    catch (Exception e) {
      System.out.println(e);
      e.printStackTrace();
    }

I get the following stack trace from the second try block:

java.lang.NullPointerException:
java.lang.NullPointerException:
        at java.lang.String.<init>(String.java)
        at postgresql.Connection.<init>(Connection.java:71)
        at postgresql.Driver.connect(Driver.java:87)
        at java.sql.DriverManager.getConnection(DriverManager.java:91)
        at java.sql.DriverManager.getConnection(DriverManager.java:149)
        at CookBook.<init>(CookBook.java:165)
        at CookBook.main(CookBook.java:335)

==============================================================================

The program was compiled with the command line:

javac -d . -classpath /usr/share/java/postgresql.jar:/usr/lib/jdk-1.1.3/classes.zip:. test.java

and my CLASSPATH env variable is:
/usr/lib/jdk-1.1.3/lib/classes.zip:/usr/share/java/postgresql.jar:.

As far as I can tell, the Class.forName() call doesn't throw any
exceptions.

Ideas, hints or suggestions greatly appreciated.

Kevin

- --
Kevin Nikiforuk					knikifor(at)gpu(dot)srv(dot)ualberta(dot)ca
- ----------------------------------------------------------------------------
    http://pgp5.ai.mit.edu/pks-commands-beta.html for my PGP public key

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Next:From: Kevin W. NikiforukDate: 1998-05-20 21:37:57
Subject: Re: [GENERAL] java.lang.NullPointerException
Previous:From: Peter MountDate: 1998-05-20 18:37:42
Subject: Re: [GENERAL] About Deleting Large Objects

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