java - Can't make any sort of Database type connecction on Netbeans 8.0.2 -

i have spent hours looking through forums , other sites try find solution problem. i've tried countless number of things try , fix it, it's still not working. i've pretty come conclusion netbeans program cannot make sort of connection beyond opening programs. see started when tried create new database. window opened, filled out information, , got error said "an error occurred while creating database: java.sql.sqlnontransientconnectionexception:java.net.connectionexception : error connectingto server localhost on port 1527 message connection timed out: connect.."

i tried connect sample database comes netbeans , database wouldn't connect. i've tried , need help.

before ask, yes have opened port, yes tried changing security file have suggested, yes have tried making new connection(which didn't work way), yes have tried creating database through coding in project (didn't work), , yes have played around proxy setting in tools>options>general.