sqldeveloper error message: Network adapter could not establish the connection error

Question

I had made connection to the remote oracle database through sqldeveloper on my system. Suddenly the power went down and I had to restart the system. Now, when I am trying t

Answer 1

I just created a local connection by breaking my head for hours. So thought of helping you guys.

• Step 1: Check your file name listener.ora located at

  C:\app\\product\12.1.0\dbhome_3\NETWORK\ADMIN

  Check your HOSTNAME, PORT AND SERVICE and give the same while creating new database connection.

• Step 2: if this doesnt work, try these combinations give PORT:1521 and SID: orcl give PORT: and SID: orcl give PORT:1521 and SID: pdborcl give PORT:1521 and

  SID: admin

If you get the error as "wrong username and password" :
Make sure you are giving correct username and password

if still it doesnt work try this: Username :system Password: .

Hope it helps!!!!