Java Database Connectivity (JDBC)

I'm testing Oracle JDBC drivers with Oracle12C.

My code looks like this:

  String hostServer = "localhost";

  String dbName = "rms12asm";

  String login = "testuser";

  String pw = "testpw";

  String strConnect = "jdbc:oracle:thin:@//" + hostServer + ":1521/"  + dbName  // + "?characterEncoding=utf8"  ;

  CTest1.log("strConnect = " + strConnect);

  conn = DriverManager.getConnection(strConnect, login, pw);

  System.out.println("conn.getClass().getCanonicalName()="  + conn.getClass().getCanonicalName());

  oracle.jdbc.driver.OracleConnection conOra = (oracle.jdbc.driver.OracleConnection) conn;

  System.out.println("conn.isLogicalConnection()=" + conOra.isLogicalConnection());

  System.out  .println("((oracle.jdbc.driver.OracleConnection)conn).isValid(10)="  + ((oracle.jdbc.driver.OracleConnection) conn).isValid(10));

System.out.println("conn.isValid(10)=" + conn.isValid(10));

I get an error trying to call Connection.isValid().

[CTest1.main] error: java.lang.AbstractMethodError: oracle.jdbc.driver.OracleConnection.isValid(I)Z

java.lang.AbstractMethodError: oracle.jdbc.driver.OracleConnection.isValid(I)Z

at com.rco.utility.CTest1.main(CTest1.java:116)

I have tried several Oracle Jar files in the classpath, including: ojdbc7.jar, ojdbc6.jar, etc.

The "isValid()" method has not caused us problems with other jdbc drivers, such as I-net sero.jar.

Can someone help explain what is going on here?

-SB