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IO Error: The Network Adapter could not establish the connection in oracle

user571093May 30 2013 — edited May 30 2013

Hi experts,

I have oracle developer days installed in my vitrual box machine. The connection to oracle datatase (11.2.0.2) contained in the oracle developer days was working fine via sql developer. I use eclipse to write some java programs to connect the database. However, somehow, I cannot connect the database via sql deveoper anymore. This is the error I got when I tried to connect it via basic connection type:
Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection

Can anybody shed a light on this issue please. Thanks a lot in advance.

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Locked on Jun 27 2013

Added on May 30 2013

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