[pgadmin-support] problem with jdbc with postgresql

hi

 

am using

jdk1.5.0_14
jdbc3  --  postgresql-8.2-508.jdbc3
psql 8.2.4

its really much confusing in connectivity..please help me giving answers to this question

1. where to save postgresql-8.2-508.jdbc3
(all have giving different ideas)

2.how to set the class path?is i have to download tomcate....

3.can you please give me a clear picture to set class
path with postgresql-8.2-508.jdbc3

4. how to run my java application files