title: cannot connect using sql developer
body: <p>cannot connect using sql developer. </p>
  
  <p>I use the same username and password in sqlPlus and it would allow me to connect, however :when I 
  try Sql Developer I get</p>
  
  <p>Status: Failure - Test failed: Listener refused the connection with the following error: ORA-12505
  TNS:listenner dows not currently know of SID given in connect descriptor.</p>
  
  <p>my oracle version win32_11gR2_database_1of2
  my computer window 8.</p>
  
  <p>I have also tried install it on XP, Vista, and Windows7 and have gotten  the same error.
  I have also gotten error when I am install oracle, the first error is say that all the computers
  do meet the minimum standard, I continue with the install.  when I try to use Sql Developer it 
  ask for the Java.exe
  <strong>C:\app12\Database\product\12.1.0\dbhome_1\jdk\bin</strong>
  and click ok</p>