Sql exception when connecting to oracle database

Question

When trying to connect to an oracle database using the code below i get an sql error. i put the code below it and the stack trace below the code. any help would be great
Connection connection = null;
        try {
            // Load the JDBC driver
            String driverName = "oracle.jdbc.driver.OracleDriver";
            Class.forName(driverName);
            //  Create a connection to the database
            String serverName = "192.168.0.2";
            String portNumber = "1158";
            String sid = "orcl";
            String url = "jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid;
            // String url = "jdbc:oracle:oci:@orcl";
            String username = "system";
            String password = "mmsi";
            connection = DriverManager.getConnection(url, username, password);
        } catch (ClassNotFoundException e) {
            System.out.println("Class Not Found Exception in connection to db");
        } catch (SQLException e) {
            System.out.println("SQL Exception in connecting to Database ");
            e.printStackTrace();
stackTrace------------------------------------------------------------------------------
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
SQL Exception in connecting to Database
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
before this.start
got to doaction
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:420)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
        at java.sql.DriverManager.getConnection(DriverManager.java:525)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at mmsiserver.conversation.<init>(conversation.java:190)
        at mmsiserver.Server.run(Server.java:105)
Exception in thread "Thread-0" java.lang.NullPointerException
        at mmsiserver.conversation.doAction(conversation.java:218)
        at mmsiserver.conversation.<init>(conversation.java:202)
        at mmsiserver.Server.run(Server.java:105)Message was edited by:
pcpitcher1

Answer 1

Please read this
http://forum.java.sun.com/thread.jspa?threadID=512566&start=0&tstart=0