Beginner on JDBC. problem to connect database postgreSQL

Question

hi there everyone,
new to JDBC.
not sure, what's wrong with that.
I am using XP, postgreSQL 7.3.3 - the database is fine ( i can create a table via cygwin).
- i have downloaded the pgSQL jdbc driver also set the classpath.
thanks in advanc
===================================
import java.sql.*;
public class Example {
public static void main(String args[])
          String userName="user1";
     String password="whatever";
try
String url = "jdbc:postgresql:myDB";
               Class.forName("org.postgresql.Driver");
Connection myConnection= DriverManager.getConnection(url,userName,password);
} catch ( java.lang.Exception ex){ ex.printStackTrace();}
===========================================================
Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
     at org.postgresql.jdbc1.AbstractJdbc1Connection.openConnection(AbstractJdbc1Connection.java:167)
     at org.postgresql.Driver.connect(Driver.java:122)
     at java.sql.DriverManager.getConnection(DriverManager.java:512)
     at java.sql.DriverManager.getConnection(DriverManager.java:172)
     at Example.main(Example.java:17)

Answer 1

Thanks colbell
=========================
I have got them or newer verion.
crypt 1.0-1
cygipc 1.13-2
cygwin 1.3.16-1
gcc 3.2-3
libncurses6 5.2-8
libreadline5 4.2a-1
readline 4.2a-1
zlib 1.1.3-6
Sun JDK 1.3
Ant 1.5
===================
i should have this perl 5.8.0-1 but when i install it directly from the net, it only has perl 5.6.2.-1 and it's doc 5.8.0-1.
i think i have installed the ant correctly but is there any way that i could test it??
what is the different between
String url = "jdbc:postgresql:myDB"; and
  jdbc:postgresql:localhost:5432/myDB
Just check the port number that you're actually
using.
how and where can i find it out??? or u mean the usually postgreSQL's port number??
Also make sure that you have installed cygipc and that
it is running. Take a look through
<cygwin>\usr\doc\Cygwin\postgresql-7.3.2.READMEi have installed cygipc - any ways i could test it?
thanks in advance