i downloaded the sql developer from the main site .i tried to adding a new connection.it showed the error no network adapter found .
first let me confirm one thing the database name and username,password are predefined ones are should i need to create those any before using these.
please let me know .i am struggling with this since a week.
Thanks in advance.
The "no network adapter found" message seems more like a Windows setup/configuration issue. If you really meant some other error instead, perhaps like
The network adapter could not establish the connection
then the following may shed some light: Re: SQL developer download - unable to connect
So in fact you do need a database to access, either local or remote. The act of installing a database locally will create "predefined" usernames with passwords you can override.
Hope this helps,
SQL Developer Team