In SQL DEVELOPER
Default connection for oracle 11g
go to connection>New Connection
Connection Name = HR or Use any name
User name = hr
Password = Your Password (This is the password that you selected during the installation of the of Oracle 11g)
Check the "Save" option
role: default
port 1521
SID : orcl
If you want to create the SYSDBA Account ( Administrator account)
Connection Name = admin ORCL or Use any name
User name = sys
Password = Your Password (This is the password that you selected during the installation of the of Oracle 11g)
role: sysdba( from the drop down)
port 1521
SID : orcl
TEST and Save Connect
Just in case if your HR account is locked because you have connected multiple number of times than you can fix this by logging into your SYS DBA account
In the objects list on your list go to the OTHER USERS and
GO to HR Account > RT Click
EDIT USER
Choose the password youlike
and UN CHECK The account locked and Uncheck the Password Expired options if they are checked in