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How I supposed to make program to stop and wait for something? JAVA

got a problem here, trying to create a login to database system at the moment. I have to classes : UserLogManagerMainWindow and DatabaseConnectionFrame. My program is about log management. I want to make a database connection :
UserLogManagerMainWindow class has a button "Connect to database", on it's click DatabaseConnectionFrame initialize and gets up a frame with jlabels and jtextfields, after I enter everything i need, i press "Login" button, after this I want that my UserLogManagerMainWindow class continues on pressenting the logs from connected database.
I have written some code about how it supposed to look : "the logic about what am i trying to say"
connectToDatabaseBtn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
DatabaseConnectionFrame dcf = new DatabaseConnectionFrame();
dcf.setVisible(true);
if(dcf.answer == true) {
importButtons(menuBar);
setJMenuBar(menuBar);
try {
DatabaseComm.getColumnNamesToPanel(model, titles);
projects = DatabaseComm.AddLogsToArrayReturnProjectNames(events);
DatabaseComm.fillDataToPanel(model, events, titles, row);
DatabaseComm.resizeColumnWidth(table);
} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
else {
System.out.println("not working");
}
}
});
But if statement does not working, i know why. That's why i'm asking how to make it work? More likely, threading is the key, but not good at it at the moment. Any tips without threading? And if threading is the only way, may i get some help of it?
Giving DatabaseConnectionFrame class below either:
package manager;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.GridBagLayout;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.InetAddress;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.SwingConstants;
import javax.swing.JButton;
public class DatabaseConnectionFrame extends JFrame{
private JPanel contentPane;
private JTextField address;
private JPasswordField password;
private JTextField username;
private JButton btnLogin;
private JButton btnCancel;
private JLabel lblPort;
private JTextField port;
public boolean answer = false;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
DatabaseConnectionFrame frame = new DatabaseConnectionFrame();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public DatabaseConnectionFrame() {
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(450,250);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
GridBagLayout gbl_contentPane = new GridBagLayout();
contentPane.setLayout(gbl_contentPane);
JLabel lblDatabaseIpAddress = new JLabel("Database ip address:");
GridBagConstraints gbc_lblDatabaseIpAddress = new GridBagConstraints();
gbc_lblDatabaseIpAddress.anchor = GridBagConstraints.EAST;
gbc_lblDatabaseIpAddress.insets = new Insets(0, 0, 5, 5);
gbc_lblDatabaseIpAddress.gridx = 0;
gbc_lblDatabaseIpAddress.gridy = 0;
contentPane.add(lblDatabaseIpAddress, gbc_lblDatabaseIpAddress);
address = new JTextField();
GridBagConstraints gbc_textField = new GridBagConstraints();
gbc_textField.insets = new Insets(0, 0, 5, 0);
gbc_textField.fill = GridBagConstraints.HORIZONTAL;
gbc_textField.gridx = 1;
gbc_textField.gridy = 0;
contentPane.add(address, gbc_textField);
address.setColumns(10);
lblPort = new JLabel("Port");
GridBagConstraints gbc_lblPort = new GridBagConstraints();
gbc_lblPort.anchor = GridBagConstraints.EAST;
gbc_lblPort.insets = new Insets(0, 0, 5, 5);
gbc_lblPort.gridx = 0;
gbc_lblPort.gridy = 1;
contentPane.add(lblPort, gbc_lblPort);
port = new JTextField();
GridBagConstraints gbc_textField1 = new GridBagConstraints();
gbc_textField1.insets = new Insets(0, 0, 5, 0);
gbc_textField1.fill = GridBagConstraints.HORIZONTAL;
gbc_textField1.gridx = 1;
gbc_textField1.gridy = 1;
contentPane.add(port, gbc_textField1);
port.setColumns(10);
JLabel lblUsername = new JLabel("Username:");
lblUsername.setHorizontalAlignment(SwingConstants.CENTER);
GridBagConstraints gbc_lblUsername = new GridBagConstraints();
gbc_lblUsername.anchor = GridBagConstraints.EAST;
gbc_lblUsername.insets = new Insets(0, 0, 5, 5);
gbc_lblUsername.gridx = 0;
gbc_lblUsername.gridy = 2;
contentPane.add(lblUsername, gbc_lblUsername);
username = new JTextField();
GridBagConstraints gbc_textField_1 = new GridBagConstraints();
gbc_textField_1.insets = new Insets(0, 0, 5, 0);
gbc_textField_1.fill = GridBagConstraints.HORIZONTAL;
gbc_textField_1.gridx = 1;
gbc_textField_1.gridy = 2;
contentPane.add(username, gbc_textField_1);
username.setColumns(10);
JLabel lblPassword = new JLabel("Password");
GridBagConstraints gbc_lblPassword = new GridBagConstraints();
gbc_lblPassword.anchor = GridBagConstraints.EAST;
gbc_lblPassword.insets = new Insets(0, 0, 5, 5);
gbc_lblPassword.gridx = 0;
gbc_lblPassword.gridy = 3;
contentPane.add(lblPassword, gbc_lblPassword);
password = new JPasswordField();
GridBagConstraints gbc_passwordField = new GridBagConstraints();
gbc_passwordField.insets = new Insets(0, 0, 5, 0);
gbc_passwordField.fill = GridBagConstraints.HORIZONTAL;
gbc_passwordField.gridx = 1;
gbc_passwordField.gridy = 3;
contentPane.add(password, gbc_passwordField);
btnLogin = new JButton("Login");
GridBagConstraints gbc_btnLogin = new GridBagConstraints();
gbc_btnLogin.insets = new Insets(0, 0, 0, 5);
gbc_btnLogin.gridx = 0;
gbc_btnLogin.gridy = 4;
contentPane.add(btnLogin, gbc_btnLogin);
btnCancel = new JButton("Cancel");
GridBagConstraints gbc_btnCancel = new GridBagConstraints();
gbc_btnCancel.gridx = 1;
gbc_btnCancel.gridy = 4;
contentPane.add(btnCancel, gbc_btnCancel);
btnCancel.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
dispose();
}
});
btnLogin.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
String dbAddress = address.getText();
String dbPort = port.getText();
String dbUsername = username.getText();
char[] dbPassword = password.getPassword();
if( dbAddress.isEmpty() || dbPort.isEmpty() || dbUsername.isEmpty() || dbPassword.length == 0) {
JOptionPane.showMessageDialog(getParent(),
"All fields have to be filled!");
}
else {
if(databaseValidation(dbAddress, dbPort, dbUsername, dbPassword)) {
JOptionPane.showMessageDialog(getParent(),
"Connected!");
answer = true;
setVisible(false);
}
else {
JOptionPane.showMessageDialog(getParent(),
"There was error connecting to the database!");
answer = false;
}
}
System.out.println(answer);
}
});
}
public boolean databaseValidation(String address, String port, String username, char[] password) {
String pw = String.valueOf(password);
System.out.println(pw);
try {
Connection con = DriverManager.getConnection("jdbc:mysql://" + address + ":" + port + "/logctrl?user=" + username + "&password=" + pw );
} catch (SQLException e) {
System.out.println("Error connecting to database!");
return false;
}
System.out.println("Connected");
return true;
}
}

If you want to wait for the user input, you have two choices, you either make your own observer pattern which can be called at some point in the future when the state changes in some way or you use a dialog, which will block the codes execution at the point the dialog is made visible and will wait till it's closed
See How to use dialogs for details
import java.awt.Frame;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
JButton btn = new JButton("Show the dialog");
add(btn);
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JDialog dialog = new JDialog((Frame)SwingUtilities.getWindowAncestor(TestPane.this), "I'm in charge now", true);
JButton btn = new JButton("Waiting");
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
dialog.dispose();
}
});
dialog.add(btn);
dialog.pack();
dialog.setLocationRelativeTo(TestPane.this);
dialog.setVisible(true);
JOptionPane.showMessageDialog(TestPane.this, "You won't see this till the dialog is closed");
}
});
}
}
}

Output not getting redirecting to proper Jtextarea

MainFrame.java
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Event;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.KeyStroke;
public class MainFrame extends JFrame{
private TextPanel textPanel1;
private TextPanel textPanel2;
private FormPanel formPanel;
private JSplitPane splitPane;
private JTabbedPane tabPane;
public MainFrame() {
super("Hello");
setLayout(new BorderLayout());
tabPane = new JTabbedPane();
textPanel1 = new TextPanel();
tabPane.addTab("Tab 1", textPanel1);
textPanel2 = new TextPanel();
tabPane.addTab("Tab 2", textPanel2);
//Newly Added code
formPanel = new FormPanel(textPanel1,textPanel2);
splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,formPanel,tabPane);
splitPane.setOneTouchExpandable(true);
add(splitPane,BorderLayout.CENTER);
// add(formPanel,BorderLayout.WEST);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setMinimumSize(new Dimension(500, 400));
setSize(600, 500);
}
}
TextPanel.java
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Scrollbar;
import java.io.ByteArrayOutputStream;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingWorker;
public class TextPanel extends JPanel {
private JTextArea textArea1;
private JTextArea textArea2;
private FormPanel formPanel;
//Newly added code
private TextPanel textPanel;
public TextPanel(){
setLayout(new BorderLayout());
textArea1 = new JTextArea();
add(new JScrollPane(textArea1),BorderLayout.CENTER);
//textArea2 = new JTextArea();
//add(new JScrollPane(textArea2),BorderLayout.CENTER);
}
//Newly added code
public void appendText(String string, TextPanel textPanel2) {
// TODO Auto-generated method stub
this.textPanel = textPanel2;
textArea1.append(string);
}
}
FormPanel.java
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.io.ObjectInputStream.GetField;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.border.Border;
public class FormPanel extends JPanel {
private static int numberOfTabs = 1;
private JLabel serverName_1;
private JLabel serverName_2;
private JButton startServer_1;
private JButton startServer_2;
//Added New Code
private TextPanel textPanel1;
private TextPanel textPanel2;
JumpHosts jumpHosts = new JumpHosts();
//Added New Code
public FormPanel(final TextPanel textPanel1,final TextPanel textPanel2){
Dimension dim = getPreferredSize();
dim.width = 350;
setPreferredSize(dim);
setMinimumSize(dim);
//Added New Code
this.textPanel = textPanel1;
this.textPanel = textPanel2;
serverName_1 = new JLabel("server1 ");
startServer_1 = new JButton("Start");
serverName_2 = new JLabel("server2 ");
startServer_2 = new JButton("Start");
startServer_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String[] ev = new String[]{"username#10.10.10.10","username#server1"};
String cmd = "ls -ltr";
//jumpHosts.JumpHosts(ev,cmd);
//Newly added code
jumpHosts.JumpHosts(ev,cmd,textPanel1);
}
});
startServer_2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String[] ev = new String[]{"username#10.10.10.10","username#server2"};
String cmd = "ls -ltr";
//jumpHosts.JumpHosts(ev,cmd);
//Newly added code
jumpHosts.JumpHosts(ev,cmd,textPanel2);
}
});
Border innerborder = BorderFactory.createTitledBorder("Detail");
Border outerborder = BorderFactory.createEmptyBorder(5, 5, 5, 5);
setBorder(BorderFactory.createCompoundBorder(outerborder, innerborder));
layoutComponents();
}
public void layoutComponents(){
setLayout(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
//////////// First row ////////////
gc.gridy = 0;
gc.weightx = 1;
gc.weighty = 0.01;
gc.gridx = 0;
gc.insets = new Insets(0, 0, 0, 5);
gc.anchor = GridBagConstraints.FIRST_LINE_START;
add(serverName_1,gc);
/////////// Next Column ////////////
gc.gridy = 0;
gc.weightx = 2;
gc.weighty = 0.01;
gc.gridx = 2;
gc.insets = new Insets(0, 0, 0, 5);
gc.anchor = GridBagConstraints.FIRST_LINE_START;
add(startServer_1,gc);
//////////// Second row ////////////
gc.gridy++;
gc.weightx = 1;
gc.weighty = 0.1;
gc.gridx = 0;
gc.insets = new Insets(0, 0, 0, 5);
gc.anchor = GridBagConstraints.FIRST_LINE_START;
add(serverName_2,gc);
/////////// Next Column ////////////
//gc.gridy = 1;
gc.weightx = 2;
gc.weighty = 0.1;
gc.gridx = 2;
gc.insets = new Insets(0, 0, 0, 5);
gc.anchor = GridBagConstraints.FIRST_LINE_START;
add(startServer_2,gc);
}
}
JumpHosts.java
import com.jcraft.jsch.*;
import java.awt.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.swing.*;
public class JumpHosts {
TextPanel textPanel = new TextPanel();
//Newly added code
public void JumpHosts(final String[] arg,final String command,final TextPanel textPanel) {
StringBuffer resultDisplayBuffer = new StringBuffer();
SwingWorker sw = new SwingWorker(){
#Override
protected Object doInBackground() throws Exception {
try{
JSch jsch = new JSch();
if(arg.length <= 1){
System.out.println("This program expects more arguments.");
System.exit(-1);
}
Session session = null;
Session[] sessions = new Session[arg.length];
String host = arg[0];
String user = host.substring(0, host.indexOf('#'));
host = host.substring(host.indexOf('#')+1);
sessions[0] = session = jsch.getSession(user, host, 22);
session.setUserInfo(new MyUserInfo());
session.connect();
//textPanel.appendText("The session has been established to "+user+"#"+host+"\n");
//Newly added code
textPanel.appendText("The session has been established to "+user+"#"+host+"\n",textPanel);
for(int i = 1; i < arg.length; i++){
host = arg[i];
user = host.substring(0, host.indexOf('#'));
host = host.substring(host.indexOf('#')+1);
int assinged_port = session.setPortForwardingL(0, host, 22);
textPanel.appendText("portforwarding: "+
"localhost:"+assinged_port+" -> "+host+":"+22+"\n");
sessions[i] = session =
jsch.getSession(user, "localhost", assinged_port);
session.setUserInfo(new MyUserInfo());
session.setHostKeyAlias(host);
session.connect();
textPanel.appendText("The session has been established to "+
user+"#"+host+"\n");
}
String sudo_pass;
{
JTextField passwordField=(JTextField)new JPasswordField(8);
Object[] ob={passwordField};
int result=
JOptionPane.showConfirmDialog(null,
ob,
"Enter password for sudo",
JOptionPane.OK_CANCEL_OPTION);
if(result!=JOptionPane.OK_OPTION){
System.exit(-1);
}
sudo_pass=passwordField.getText();
}
Channel channel=session.openChannel("exec");
// man sudo
// -S The -S (stdin) option causes sudo to read the password from the
// standard input instead of the terminal device.
// -p The -p (prompt) option allows you to override the default
// password prompt and use a custom one.
((ChannelExec)channel).setCommand("sudo -S -p '' "+command);
InputStream in = channel.getInputStream();
OutputStream out = channel.getOutputStream();
((ChannelExec) channel).setErrStream(System.err);
channel.connect();
out.write((sudo_pass + "\n").getBytes());
out.flush();
byte[] tmp = new byte[1024];
while (true) {
while (in.available() > 0) {
int i = in.read(tmp, 0, 1024);
if (i < 0)
break;
textPanel.appendText(new String(tmp,0,i));
}
if (channel.isClosed()) {
textPanel.appendText(new String("exit-status: " + channel.getExitStatus())+ "\n");
break;
}
try {
Thread.sleep(1000);
} catch (Exception ee) {
System.out.println(ee);
}
}
channel.disconnect();
textPanel.appendText("Disconnect\n\n");
for(int i = sessions.length-1; i >= 0; i--){
sessions[i].disconnect();
}
}
catch(Exception e){
System.out.println(e);
}
return null;
}
public void done(){
try {
System.out.println(get());
} catch (Exception ex) {
ex.printStackTrace();
}
}
};
sw.execute();
}
public static class MyUserInfo implements UserInfo, UIKeyboardInteractive{
public String getPassword(){ return passwd; }
public boolean promptYesNo(String str){
Object[] options={ "yes", "no" };
int foo=JOptionPane.showOptionDialog(null,
str,
"Warning",
JOptionPane.DEFAULT_OPTION,
JOptionPane.WARNING_MESSAGE,
null, options, options[0]);
return foo==0;
}
String passwd;
JTextField passwordField=(JTextField)new JPasswordField(20);
public String getPassphrase(){ return null; }
public boolean promptPassphrase(String message){ return true; }
public boolean promptPassword(String message){
Object[] ob={passwordField};
int result=
JOptionPane.showConfirmDialog(null, ob, message,
JOptionPane.OK_CANCEL_OPTION);
if(result==JOptionPane.OK_OPTION){
passwd=passwordField.getText();
return true;
}
else{ return false; }
}
public void showMessage(String message){
JOptionPane.showMessageDialog(null, message);
}
final GridBagConstraints gbc =
new GridBagConstraints(0,0,1,1,1,1,
GridBagConstraints.NORTHWEST,
GridBagConstraints.NONE,
new Insets(0,0,0,0),0,0);
private Container panel;
public String[] promptKeyboardInteractive(String destination,
String name,
String instruction,
String[] prompt,
boolean[] echo){
panel = new JPanel();
panel.setLayout(new GridBagLayout());
gbc.weightx = 1.0;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.gridx = 0;
panel.add(new JLabel(instruction), gbc);
gbc.gridy++;
gbc.gridwidth = GridBagConstraints.RELATIVE;
JTextField[] texts=new JTextField[prompt.length];
for(int i=0; i<prompt.length; i++){
gbc.fill = GridBagConstraints.NONE;
gbc.gridx = 0;
gbc.weightx = 1;
panel.add(new JLabel(prompt[i]),gbc);
gbc.gridx = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weighty = 1;
if(echo[i]){
texts[i]=new JTextField(20);
}
else{
texts[i]=new JPasswordField(20);
}
panel.add(texts[i], gbc);
gbc.gridy++;
}
if(JOptionPane.showConfirmDialog(null, panel,
destination+": "+name,
JOptionPane.OK_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE)
==JOptionPane.OK_OPTION){
String[] response=new String[prompt.length];
for(int i=0; i<prompt.length; i++){
response[i]=texts[i].getText();
}
return response;
}
else{
return null; // cancel
}
}
}
}
so whenever I am clicking on any button the output gets redirected to only one textarea whereas other seems to be no usable. i.e to the last created tab.
I want that when I am clicking on button 1 then it should write to tab 1 and when I am clicking on button 2 then it should write to tab 2 and so on.
Examples appreciated as I am new to java

In JumpHosts:
TextPanel textPanel = new TextPanel();
you create an instance of TextPanel which is referenced by no other object in the program. This is not either of the TextPanels you created in MainFrame.
You need to pass the TextPanels created in MainFrame, namely:
private TextPanel textPanel;
private TextPanel textPanel2;
into your JumpHosts constructor:
JumpHosts(TextPanel textPanel1, TextPanel textPanel2)
to be able to reference the same TextPanel as MainFrame does.
Response to Followup:
You will need to pass your TextPanel first to your FormPanel constructor from within your MainFrame constructor. You will then need to modify your FormPanel contructor to pass the TextPanel to your JumpHosts constructor.

Why are JButtons not displaying in a JFrame?

I am trying to develop a voting GUI and I have a main class and a ballot class. The Ballot class extends JPanel and creates buttons inside the class. I am trying to add Ballot objects to the main JFrame but when I run the program, the buttons do not display. Any help would be appreciated. Here is the code.
Assig5.java:
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.WindowConstants;
import javax.swing.BoxLayout;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.Scanner;
import java.util.ArrayList;
public class Assig5 extends JFrame
{
public Assig5()
{
super("E-Vote Version 1.0");
JPanel castVotePanel = new JPanel();
BoxLayout layout = new BoxLayout(castVotePanel, BoxLayout.Y_AXIS);
castVotePanel.setLayout(layout);
ArrayList<String> ballots = new ArrayList<String>();
try{
ballots = readBallotFile("ballots.txt");
}
catch(FileNotFoundException e){
System.exit(0);
}
ArrayList<Ballot> ballotList = addBallots(ballots);
for(Ballot b : ballotList)
{
add(b);
}
castVotePanel.add(createLoginButton());
castVotePanel.add(createCastButton());
add(castVotePanel);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
pack();
setVisible(true);
}
public static void main(String args[])
{
Assig5 assig5 = new Assig5();
}
public JButton createLoginButton()
{
JButton loginButton = new JButton("Login to Vote");
loginButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
// display/center the jdialog when the button is pressed
String input = JOptionPane.showInputDialog("Please enter your voter ID: ");
}
});
return loginButton;
}
public JButton createCastButton()
{
JButton castButton = new JButton("Cast Vote");
castButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
}
});
return castButton;
}
public ArrayList<Ballot> addBallots(ArrayList<String> ballotContents)
{
ArrayList<Ballot> ballotList = new ArrayList<Ballot>();
for(int i = 0; i < ballotContents.size(); i++)
{
String[] splitBallotContent = ballotContents.get(i).split("[:,]");
String[] options = new String[splitBallotContent.length - 2];
for(int j = 2; j < splitBallotContent.length; j++)
{
options[j - 2] = splitBallotContent[j];
}
Ballot ballot = new Ballot(splitBallotContent[0], splitBallotContent[1], options);
ballotList.add(ballot);
}
return ballotList;
}
public static ArrayList<String> readBallotFile(String filename) throws FileNotFoundException
{
ArrayList<String> list = new ArrayList<String>();
Scanner s = new Scanner(new File(filename));
int numBallots = Integer.parseInt(s.nextLine()); //we need to get to next line
for(int i = 0; i < numBallots; i++)
{
if(s.hasNextLine())
{
list.add(s.nextLine());
}
}
s.close();
return list;
}
Ballot.java:
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.WindowConstants;
import javax.swing.BoxLayout;
import java.awt.*;
import java.awt.event.*;
public class Ballot extends JPanel
{
public Ballot(String ballotID, String title, String[] options)
{
super();
BoxLayout layout = new BoxLayout(this, BoxLayout.Y_AXIS);
setLayout(layout);
add(new JLabel(title, JLabel.CENTER));
for(String s : options)
{
add(new JButton(s));
//add actionlistener here
}
}
}

JFrame uses a BorderLayout, you are adding both the castVotePanel and all the Ballot panels to the same position on the frame (CENTER). You might want to consider using a different layout manager
See How to Use BorderLayout and Laying Out Components Within a Container for more details.
For example...
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
public class Assig5 extends JFrame {
public Assig5() {
super("E-Vote Version 1.0");
JPanel castVotePanel = new JPanel();
BoxLayout layout = new BoxLayout(castVotePanel, BoxLayout.Y_AXIS);
castVotePanel.setLayout(layout);
ArrayList<String> ballots = new ArrayList<String>();
try {
ballots = readBallotFile("ballots.txt");
} catch (FileNotFoundException e) {
System.exit(0);
}
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
ArrayList<Ballot> ballotList = addBallots(ballots);
for (Ballot b : ballotList) {
add(b, gbc);
}
castVotePanel.add(createLoginButton());
castVotePanel.add(createCastButton());
add(castVotePanel, gbc);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
pack();
setVisible(true);
}
public static void main(String args[]) {
Assig5 assig5 = new Assig5();
}
public JButton createLoginButton() {
JButton loginButton = new JButton("Login to Vote");
loginButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// display/center the jdialog when the button is pressed
String input = JOptionPane.showInputDialog("Please enter your voter ID: ");
}
});
return loginButton;
}
public JButton createCastButton() {
JButton castButton = new JButton("Cast Vote");
castButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
return castButton;
}
public ArrayList<Ballot> addBallots(ArrayList<String> ballotContents) {
ArrayList<Ballot> ballotList = new ArrayList<Ballot>();
int id = 0;
for (int i = 0; i < 10; i++) {
String[] options = new String[]{"A", "B", "C", "D"};
Ballot ballot = new Ballot(Integer.toString(++id), "Help " + id, options);
ballotList.add(ballot);
}
return ballotList;
}
public static ArrayList<String> readBallotFile(String filename) throws FileNotFoundException {
ArrayList<String> list = new ArrayList<String>();
// Scanner s = new Scanner(new File(filename));
// int numBallots = Integer.parseInt(s.nextLine()); //we need to get to next line
// for (int i = 0; i < numBallots; i++) {
// if (s.hasNextLine()) {
// list.add(s.nextLine());
// }
//
// }
// s.close();
return list;
}
public class Ballot extends JPanel {
public Ballot(String ballotID, String title, String[] options) {
super();
BoxLayout layout = new BoxLayout(this, BoxLayout.Y_AXIS);
setLayout(layout);
add(new JLabel(title, JLabel.CENTER));
for (String s : options) {
add(new JButton(s));
//add actionlistener here
}
}
}
}

JFrame uses BorderLayout by default and your all panels are on center of border that is why its not showing up
Use different positions or different layouts
for more on layouts : https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html
https://docs.oracle.com/javase/tutorial/uiswing/layout/using.html

Database displaying []?

Im made a program that takes strings from the whole jtable and populates my database in ms access. But whenever i run it my database has [] instead of the actual information. How do i take the information in my jtable and use that to populate my database?
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class apples extends JPanel {
static JTable table;
static JFrame frame;
static apples a;
static ActionListener actionListener;
static ActionListener actionListenerImport;
static ActionListener actionListenerAddrow;
static String[] columns = {"Fname","Lname"};
static String[][] data;
static DefaultTableModel model = new DefaultTableModel(data, columns);
public static void main(String[] args) {
table = new JTable(model);
frame = new JFrame();
table.setPreferredScrollableViewportSize(new Dimension(450, 200));
table.setFillsViewportHeight(true);
JScrollPane jps = new JScrollPane(table);
JPanel panel = new JPanel(new GridBagLayout());
panel.add(jps);
GridBagConstraints c = new GridBagConstraints();
JButton b1 = new JButton("Start");
c.gridx = 1;
c.gridy = 0;
c.insets = new Insets(10, 10, 10, 10);
panel.add(b1, c);
JButton b2 = new JButton("Import");
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(10, 10, 10, 10);
panel.add(b2, c);
JButton b3 = new JButton("Add Row");
c.gridx = 3;
c.gridy = 0;
c.insets = new Insets(10,10,10,10);
panel.add(b3, c);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(panel, BorderLayout.NORTH);
frame.getContentPane().add(jps, BorderLayout.CENTER);
frame.setVisible(true);
frame.pack();
actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:TestDatabase");
Statement s = con.createStatement();
String deleteRows = "DELETE FROM Table1";
s.execute(deleteRows);
ArrayList<String> numdata = new ArrayList<String>();
ArrayList<String> numdata2 = new ArrayList<String>();
String insertTable = ("INSERT INTO Table1(Fname,Lname) VALUES('"+numdata+"','"+numdata2+"');");//get data from table and put in here
for (int count = 0; count < model.getRowCount(); count++){
numdata.add(model.getValueAt(count, 0).toString());
for (int count1 = 0; count1 < model.getRowCount(); count1++){
numdata2.add(model.getValueAt(count, 1).toString());
s.executeUpdate(insertTable);
}
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
e.getMessage();
} catch (SQLException e) {
e.printStackTrace();
e.getMessage();
}
}
};
actionListenerImport = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:TestDatabase");
Statement s = con.createStatement();
String selTable = "SELECT * FROM Table1";
s.execute(selTable);
ResultSet rs = s.getResultSet();
while((rs!= null) && (rs.next())) {
model.addRow(new String[]{rs.getString(1),rs.getString(2)});
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
e.getMessage();
} catch (SQLException e) {
e.printStackTrace();
e.getMessage();
}
}
};
actionListenerAddrow = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
model.addRow(new String[]{"",""});
}
};
b1.addActionListener(actionListener);
b2.addActionListener(actionListenerImport);
b3.addActionListener(actionListenerAddrow);
}
}

ArrayList<String> numdata = new ArrayList<String>();
ArrayList<String> numdata2 = new ArrayList<String>();
String insertTable = ("INSERT INTO Table1(Fname,Lname) VALUES('"+numdata+"','"+numdata2+"');");
You are attempting to add an ArrayList into your database. You can't just change the values of numdata and numdata2 in your loop.
Instead you need to create a dynamic SQL statement. The easiest way to do this is to use a PreparedStatement, then you can dynamically change the parameters. The code would be something like:
String sql = "INSERT INTO Table1(Fname,Lname) VALUES(?,?)";
PreparedStatement stmt = connection.prepareStatement(sql);
for (int count = 0; count < model.getRowCount(); count++)
{
String numdata = model.getValueAt(count, 0).toString();
String numdata2 = model.getValueAt(count, 1).toString();
stmt.setString( 1, numdata );
stmt.setString( 2, numdata2 );
stmt.executeUpdate();
}

How do I avoid creating Swing elements within a main method?

Currently my code will not run because I have no main, but when I make a main it must be static, and I am under the impression I shouldn't be making all of my variables for the Swing elements Static, as per the advice of many.
I'm not sure how to invoke the methods without using main as the constructor, currently my gui does not appear.
Thanks.
package movieinfo;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import org.apache.commons.io.FileUtils;
public class Swinggui {
JButton enter;
public JTextField movietext;
JList listofmovies;// converts moviestowatch into gui
// element.
File textfilemovie; // file which movies marked for watching
// are saved
java.util.List<String> moviestowatch; // arraylist which is
// populated by
// textfilemovie
// than printed to
// GUI element
ListSelectionListener setSearch;
JButton add;
String info;
public Swinggui() throws IOException {
yourMovies();
gui();
jsonAndButtons();
}
public void gui() {
JFrame maingui = new JFrame("Gui");
maingui.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.VERTICAL;
enter = new JButton("Get Info");
c.gridx = 2;
c.gridy = 1;
maingui.add(enter, c);
add = new JButton("add");
c.gridx = 5;
c.gridy = 6;
maingui.add(add, c);
JTextArea movieinfo = new JTextArea(info, 5, 20);
movieinfo.setBorder(BorderFactory.createMatteBorder(2, 2, 2, 2,
Color.red));
movietext = new JTextField(18);
c.gridx = 1;
c.gridy = 1;
maingui.add(movietext, c);
final JScrollPane scrolll = new JScrollPane(movieinfo);
c.gridx = 1;
c.gridy = 3;
c.gridwidth = 2;
maingui.add(scrolll, c);
final JLabel titlee = new JLabel("Enter movie name below!");
c.gridx = 1;
c.gridy = 0;
maingui.add(titlee, c);
c.gridx = 1;
c.gridy = 3;
maingui.add(titlee, c);
final JLabel watchlist = new JLabel("Watchlist");
c.gridx = 5;
c.gridy = 1;
maingui.add(watchlist, c);
maingui.setResizable(false);
maingui.setVisible(true);
listofmovies = new JList(moviestowatch.toArray());
c.gridx = 4;
c.gridy = 3;
maingui.add(new JScrollPane(listofmovies), c);
movieinfo.setLineWrap(true);
movieinfo.setWrapStyleWord(true);
movieinfo.setEditable(false);
scrolll.getPreferredSize();
listofmovies.addListSelectionListener(setSearch);
maingui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
maingui.pack();
}
public void jsonAndButtons() {
enter.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println(apicall.getMovieInfo(movietext.getText()
.replaceAll(" ", "%20")));
info = apicall.getMovieInfo(movietext.getText().replaceAll(" ",
"%20"));
}
});
add.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
try {
FileUtils.writeStringToFile(new File(
org.apache.commons.io.FileUtils.getUserDirectory()
+ "/yourmovies.txt"),
"\n" + movietext.getText(), true);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
moviestowatch = FileUtils.readLines(textfilemovie);
listofmovies = new JList(moviestowatch.toArray());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
public void yourMovies() throws IOException {
textfilemovie = new File(
org.apache.commons.io.FileUtils.getUserDirectory()
+ "/yourmovies.txt");
textfilemovie.createNewFile();
moviestowatch = FileUtils.readLines(textfilemovie);
setSearch = new ListSelectionListener() {
public void valueChanged(ListSelectionEvent arg0) {
info = apicall.getMovieInfo(((String) listofmovies
.getSelectedValue()).replaceAll(" ", "%20"));
}
};
}
}

Firstly, don't keep everything in one class. Create some other class and then create object of that type, and invoke its methods, it would look like this in your main() method:
MyClass myClass = new MyClass();
myClass.doStuff();

inside your main put:
new Swinggui();
This will pull you out of the static context and bring you into the non-static Swinggui constructor

Make your class Swinggui extend JFrame.
Then create a main method and create object of Swinggui
Swinggui gui = new Swinggui();
now you must make gui visible, for this write.
gui.setVisible(true);
And you are good to go.
Refer everything in code using "this" and you would have non static items.