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Author begginer question jdbc not working
Neil Dugan

2005-11-04, 3:24 am

Hi I am very new to Java.

I am having trouble getting connection to a database. I installed the
Debian package 'libpg-java' version '8.0-312-1'.

I can't seem to get it to work. I copied the 'basic.java' example from
'/usr/share/doc/libpg-java/examples/example' to the '/tmp' directory.
Then tried to compile and run it.
$ javac basic.java
basic.java: In class 'example.basic':
basic.java: In method 'example.basic.main(java.lang.String[])':
basic.java:206: warning: The method 'setLogStream' in class
'java.sql.DriverManager' has been deprecated.
DriverManager.setLogStream(System.err);
^
1 warning

$ java basic
java.lang. NoClassDefFoundError

at java.lang.VMClassLoader.nativeDefineClass (VMClassLoader.java)
at java.lang.VMClassLoader.defineClass (VMClassLoader.java:94)
at java.lang.ClassLoader.defineClass (ClassLoader.java:673)
at java.security.SecureClassLoader.defineClass
(SecureClassLoader.java:108)
at java.net.URLClassLoader.findClass (URLClassLoader.java:926)
at java.lang.ClassLoader.loadClass (ClassLoader.java:360)
at java.lang.ClassLoader$1.loadClass (ClassLoader.java:1285)
at java.lang.ClassLoader.loadClass (ClassLoader.java:304)
at java.lang.VirtualMachine.main (VirtualMachine.java:99)

Any help in getting this to work would be appreciated.

Regard Neil.

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Dave Cramer

2005-11-04, 3:24 am

Neil,

Just a shot in the dark, but I'm guessing you don't have your
classpath set to the current directory.

ie CLASSPATH=./

that will find basic

then you will need to add postgresql to it as well.

Dave
On 3-Nov-05, at 9:15 PM, Neil Dugan wrote:

> Hi I am very new to Java.
>
> I am having trouble getting connection to a database. I installed
> the Debian package 'libpg-java' version '8.0-312-1'.
>
> I can't seem to get it to work. I copied the 'basic.java' example
> from '/usr/share/doc/libpg-java/examples/example' to the '/tmp'
> directory. Then tried to compile and run it.
> $ javac basic.java
> basic.java: In class 'example.basic':
> basic.java: In method 'example.basic.main(java.lang.String[])':
> basic.java:206: warning: The method 'setLogStream' in class
> 'java.sql.DriverManager' has been deprecated.
> DriverManager.setLogStream(System.err);
> ^
> 1 warning
>
> $ java basic
> java.lang. NoClassDefFoundError

> at java.lang.VMClassLoader.nativeDefineClass (VMClassLoader.java)
> at java.lang.VMClassLoader.defineClass (VMClassLoader.java:94)
> at java.lang.ClassLoader.defineClass (ClassLoader.java:673)
> at java.security.SecureClassLoader.defineClass
> (SecureClassLoader.java:108)
> at java.net.URLClassLoader.findClass (URLClassLoader.java:926)
> at java.lang.ClassLoader.loadClass (ClassLoader.java:360)
> at java.lang.ClassLoader$1.loadClass (ClassLoader.java:1285)
> at java.lang.ClassLoader.loadClass (ClassLoader.java:304)
> at java.lang.VirtualMachine.main (VirtualMachine.java:99)
>
> Any help in getting this to work would be appreciated.
>
> Regard Neil.
>
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> broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster
>
>



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