con = DriverManager.getConnection(url, props);

String url = "jdbc:oracle:thin:@localhost:1158:searchengine";

    //properties for creating connection to Oracle database
    Properties props = new Properties();
    props.setProperty("user", "sys");
    props.setProperty("password", "1234");

    //creating connection to Oracle database using JDBC
    try
        {
            //Class.forName("oracle.jdbc.OracleDriver");
            con = DriverManager.getConnection(url, props);
            //con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1158:searchengine", "system", "1234");
            String query = "alter session set nls_calendar='Persian'";
            PreparedStatement pr = con.prepareStatement(query);
            pr.execute();
            query = "select sysdate from dual";
            pr = con.prepareStatement(query);
            ResultSet res = pr.executeQuery();
            while (res.next())
                {
                    System.out.println(res.toString());
                }
        }
    catch (Exception e)
        {
            e.printStackTrace();
            return false;
        }

    java.sql.SQLRecoverableException: IO Error: Got minus one from a read call
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:208)
    at Controllers.DBController.connect(DBController.java:24)
    at Wrapper.TestMain.start(TestMain.java:21)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)
Caused by: oracle.net.ns.NetException: Got minus one from a read call
    at oracle.net.ns.Packet.receive(Packet.java:311)
    at oracle.net.ns.NSProtocol.connect(NSProtocol.java:300)
    at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1140)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:340)