GetConnection hanging, then stops. can't get connected

Question

am writing a java application that connects to our Oracle 8i database. i seem to be following the oracle instructions exactly, but when i go to connect it just hangs. no error and no connection. i'm using Sun's Forte IDE. here's my code, can you help?
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
import javax.swing.border.*;
import java.sql.*;
import java.sql.DriverManager;
import java.io.*;
import java.math.*;
import java.lang.*;
import oracle.jdbc.driver.OracleDriver;
public class TableLoader implements LayoutManager {
static String[] ConnectOptionNames = { "Connect" };
static String ConnectTitle = "Connection Information";
Dimension origin = new Dimension(0, 0);
JButton fetchButton;
JButton showConnectionInfoButton;
JPanel connectionPanel;
JFrame frame; // The query/results window.
JLabel userNameLabel;
JTextField userNameField;
JLabel passwordLabel;
JTextField passwordField;
// JLabel queryLabel;
JTextArea queryTextArea;
JComponent queryAggregate;
JLabel serverLabel;
JTextField serverField;
JLabel driverLabel;
JTextField driverField;
JPanel mainPanel;
TableSorter sorter;
JDBCAdapter dataBase;
JScrollPane tableAggregate;
* Brigs up a JDialog using JOptionPane containing the connectionPanel.
* If the user clicks on the 'Connect' button the connection is reset.
void activateConnectionDialog() {
if(JOptionPane.showOptionDialog(tableAggregate, connectionPanel, ConnectTitle,
JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE,
null, ConnectOptionNames, ConnectOptionNames[0]) == 0) {
System.out.println("Inside activateConnectionDialog about to connect, next output is - should be connected");
connect();
frame.setVisible(true);
System.out.println("should be connected");
else if(!frame.isVisible())
System.out.println("didnt connect");
// System.exit(0);
* Creates the connectionPanel, which will contain all the fields for
* the connection information.
public void createConnectionDialog() {
// Create the labels and text fields.
userNameLabel = new JLabel("User name: ", JLabel.RIGHT);
userNameField = new JTextField("tiger");
passwordLabel = new JLabel("Password: ", JLabel.RIGHT);
passwordField = new JTextField("scott");
serverLabel = new JLabel("Database URL: ", JLabel.RIGHT);
// serverField = new JTextField("jdbc:sybase://dbtest:1455/pubs2");
serverField = new JTextField("jdbc:oracle:oci8:@LMTD");
driverLabel = new JLabel("Driver: ", JLabel.RIGHT);
// driverField = new JTextField("connect.sybase.SybaseDriver");
driverField = new JTextField("oracle.jdbc.driver.OracleDriver");
connectionPanel = new JPanel(false);
connectionPanel.setLayout(new BoxLayout(connectionPanel,
BoxLayout.X_AXIS));
JPanel namePanel = new JPanel(false);
namePanel.setLayout(new GridLayout(0, 1));
namePanel.add(userNameLabel);
namePanel.add(passwordLabel);
namePanel.add(serverLabel);
namePanel.add(driverLabel);
JPanel fieldPanel = new JPanel(false);
fieldPanel.setLayout(new GridLayout(0, 1));
fieldPanel.add(userNameField);
fieldPanel.add(passwordField);
fieldPanel.add(serverField);
fieldPanel.add(driverField);
connectionPanel.add(namePanel);
connectionPanel.add(fieldPanel);
public TableLoader() {
mainPanel = new JPanel();
// Create the panel for the connection information
createConnectionDialog();
// Create the buttons.
showConnectionInfoButton = new JButton("Configuration");
showConnectionInfoButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("About to connect...");
activateConnectionDialog();
fetchButton = new JButton("Fetch");
fetchButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fetch();
// Create the query text area and label.
queryTextArea = new JTextArea("SELECT * FROM DAILY_LSNR_LOG WHERE C_IP = 192.168.60.138", 25, 25);
queryAggregate = new JScrollPane(queryTextArea);
queryAggregate.setBorder(new BevelBorder(BevelBorder.LOWERED));
// Create the table.
tableAggregate = createTable();
tableAggregate.setBorder(new BevelBorder(BevelBorder.LOWERED));
// Add all the components to the main panel.
mainPanel.add(fetchButton);
mainPanel.add(showConnectionInfoButton);
mainPanel.add(queryAggregate);
mainPanel.add(tableAggregate);
mainPanel.setLayout(this);
// Create a Frame and put the main panel in it.
frame = new JFrame("TableExample");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}});
frame.setBackground(Color.lightGray);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setVisible(false);
frame.setBounds(200, 200, 640, 480);
activateConnectionDialog();
public void connect() {
String[] tstarr = new String[100];
try {
Class driverOK = Class.forName("oracle.jdbc.driver.OracleDriver");
// DriverManager.getConnection ("jdbc:oracle:oci8:@lmdw","lmtlog", "yama");
System.out.println("Set the driver, now doing connect");
DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
System.out.println("Made it past driver registration " + serverField.getText() + ", " + userNameField.getText() + ", " + passwordField.getText());
Connection con = DriverManager.getConnection (serverField.getText(),userNameField.getText(),passwordField.getText());
System.out.println("I made it");
Statement stmt = con.createStatement();
for(int i=0; i<10; i++) { tstarr[i] = "component#" + i; }
stmt.close();
con.close();
catch (ClassNotFoundException nf) {
System.out.println("Couldn't find driver - jeh");
catch (SQLException badsql) {
System.out.println("Caught SQL exception in TableLoader - jeh");
catch (Exception e) {
System.out.println( e.getMessage());
e.printStackTrace();
/* dataBase = new JDBCAdapter(
serverField.getText(),
driverField.getText(),
userNameField.getText(),
passwordField.getText());
sorter.setModel(dataBase);
jeh */
public void fetch() {
dataBase.executeQuery(queryTextArea.getText());
public JScrollPane createTable() {
sorter = new TableSorter();
//connect();
//fetch();
// Create the table
JTable table = new JTable(sorter);
// Use a scrollbar, in case there are many columns.
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
// Install a mouse listener in the TableHeader as the sorter UI.
sorter.addMouseListenerToHeaderInTable(table);
JScrollPane scrollpane = new JScrollPane(table);
return scrollpane;
// public static void main(String s[]) {
// new TableLoader();
public Dimension preferredLayoutSize(Container c){return origin;}
public Dimension minimumLayoutSize(Container c){return origin;}
public void addLayoutComponent(String s, Component c) {}
public void removeLayoutComponent(Component c) {}
public void layoutContainer(Container c) {
Rectangle b = c.getBounds();
int topHeight = 90;
int inset = 4;
showConnectionInfoButton.setBounds(b.width-2*inset-120, inset, 120, 25);
fetchButton.setBounds(b.width-2*inset-120, 60, 120, 25);
// queryLabel.setBounds(10, 10, 100, 25);
queryAggregate.setBounds(inset, inset, b.width-2*inset - 150, 80);
tableAggregate.setBounds(new Rectangle(inset,
inset + topHeight,
b.width-2*inset,
b.height-2*inset - topHeight));
}

Answer 1

judeyash wrote:
Hi there
I've set up a home office upstairs but can't connect to the Internet. Sometimes I can see 4 bars on wifi but can't connect (after buying a N dongle - it helped for one day and now it doesn't!). I can see all my neighbours networks.
So tried using powerline Ethernet adaptors upstairs - again worked for one day then as soon as my husband used his laptop downstairs (plugged in) they stopped working.
This is taking so much time to try and fix. If I bought a booster would that help and if so which one? Or are there fancy powerline adaptors that I could use (I'm using the ones given with my bt vision box)
Please help
INSSIDER
Download Inssider2 for free from http://www.metageek.net/products/inssider/download install on your lap top then use your laptop downstairs same room as router
it will  show you if your hub is still sending wifi when the husbands laptop is plugged in downstairs
as power line adapters do the same its probably not interference
If any post helps tick the star box on the left
Just cause Im paranoid dont mean they are not out to get me