Exception in thread "main" java.sql.SQLException: Listener refused the connection with the following error: ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:localhost:1521:orcl

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oraenter code herecle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at com.test.Date.main(Date.java:13)

Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","tiger");

ORCL =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SID = orcl)
    )
)

try {
                Class.forName("oracle.jdbc.OracleDriver");
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
                return;
            }
            Connection con = null;
            try {
                con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","tiger");
                   } catch (SQLException ex) {
            ex.printStackTrace();
        } finally {
            close(connection);
        }
return

jdbc:oracle:thin:@//localhost:1521:orcl","system","tiger

jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCPS)(HOST=<host>)(PORT=<port>))(CONNECT_DATA=(SERVICE_NAME=<service>)))