I installed Oracle (already configured for redhat linux), and I installed the following sqldevbeloper I have 2 problems:
1 - The "Connect" button does not appear in the interface, but the button "test" exists
2 - to create a new connection I took the necessary information, but when I press the "test" button, the error message is displayed:
"The Network adapter Could not Establish the connection"
Below the information entered for the connection:
Password: password of oracle
Connection Type: Base
Host Name: localhost
Can someone help me on this?
Which version of SQL Developer?
That error usually means a basic networking problem (e.g. can't connect to hostname). Try following this Oracle an' T'ing: Troubleshooting SQL Developer Connection Problems, specifically the "Basic Network Connectivity" Section.