You are trying to connect using JDBC, right? Take a look at http://jdbc.postgresql.org/doc.html Which errors do you get? Is the server listening on standard port?
I need to install on my local Windows XP machine PostgreSQL to test some Java applications.
The trouble is that I cannot connect to PostgreSQL via Java application, because the connection fails every time...what's the problem? I have not installed PL/Java package cause my Postgre installer disabled this option...it is the matter???