I am absolutely new to oracle. I am using oracle 10g connection and just on experimental basis trying to connect to HR schema, through the database explorer. After much difficulty I figured SID, hostname etc, but now m stuck again.
Now I'm trying to establish a connection to the Database via eclipse but the ping keeps failing and get the following error
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:113) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:147) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:257) at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:389) at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:454) at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:165) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:802) at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.createConnection(JDBCConnection.java:206) at org.eclipse.datatools.connectivity.DriverConnectionBase.internalCreateConnection(DriverConnectionBase.java:104) at org.eclipse.datatools.connectivity.DriverConnectionBase.open(DriverConnectionBase.java:53) at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.open(JDBCConnection.java:72) at org.eclipse.datatools.enablement.internal.oracle.JDBCOracleConnectionFactory.createConnection(JDBCOracleConnectionFactory.java:27) at org.eclipse.datatools.connectivity.internal.ConnectionFactoryProvider.createConnection(ConnectionFactoryProvider.java:83) at org.eclipse.datatools.connectivity.internal.ConnectionProfile.createConnection(ConnectionProfile.java:355) at org.eclipse.datatools.connectivity.ui.PingJob.createTestConnection(PingJob.java:76) at org.eclipse.datatools.connectivity.ui.PingJob.run(PingJob.java:59) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)