I'm putting together the basic layout for a contacts book, and I want to know how I can make the 3 test buttons span from edge to edge just as the arrow buttons do.
private static class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
System.out.println("Code Placeholder");
}
}
public static void main(String[] args) {
//down button
ImageIcon downArrow = new ImageIcon("down.png");
JButton downButton = new JButton(downArrow);
ButtonHandler downListener = new ButtonHandler();
downButton.addActionListener(downListener);
//up button
ImageIcon upArrow = new ImageIcon("up.png");
JButton upButton = new JButton(upArrow);
ButtonHandler upListener = new ButtonHandler();
upButton.addActionListener(upListener);
//contacts
JButton test1Button = new JButton("Code Placeholder");
JButton test2Button = new JButton("Code Placeholder");
JButton test3Button = new JButton("Code Placeholder");
Box box = Box.createVerticalBox();
box.add(test1Button);
box.add(test2Button);
box.add(test3Button);
JPanel content = new JPanel();
content.setLayout(new BorderLayout());
content.add(box, BorderLayout.CENTER);
content.add(downButton, BorderLayout.SOUTH);
content.add(upButton, BorderLayout.NORTH);
JFrame window = new JFrame("Contacts");
window.setContentPane(content);
window.setSize(400, 600);
window.setLocation(100, 100);
window.setVisible(true);
}
Following up on #kloffy's suggestion:
package playground.tests;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import junit.framework.TestCase;
public class ButtonTest extends TestCase {
public void testThreeButtons() throws Exception {
JPanel panel = new JPanel();
panel.setLayout(new GridLayout());
JButton button1 = new JButton("A");
JButton button2 = new JButton("B");
JButton button3 = new JButton("C");
panel.add(button1);
panel.add(button2);
panel.add(button3);
JFrame window = new JFrame("Contacts");
window.setContentPane(panel);
window.setSize(300, 600);
window.pack();
window.setVisible(true);
int width = button1.getWidth();
assertEquals(width, button2.getWidth());
assertEquals(width, button3.getWidth());
}
}
Related
I am a new to Java, I met a problem. Once I click the Button, it never shows me another form, just disappear. You can see, I set the button ActionListener, but it only run the second line (close the current form).
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class login implements ActionListener {
public login(){
JFrame frame = new JFrame("Login");
frame.setLayout(new GridLayout(5,1));
JLabel label1 = new JLabel("User Name:");
JPanel panel1 = new JPanel();
frame.add(new JPanel());
frame.add(panel1);
panel1.add(label1);
JLabel label2 = new JLabel("Password:");
JPanel panel2 = new JPanel();
frame.add(panel2);
panel2.add(label2);
JPanel panel3 = new JPanel();
JButton button1 = new JButton("Register");
//button1.addActionListener(this);
JButton button2 = new JButton("Login");
//button2.addActionListener(this);
JButton button3 = new JButton("Cancel");
//button3.addActionListener(this);
panel3.add(button1);
panel3.add(button2);
panel3.add(button3);
frame.add(panel3);
JTextField JTF = new JTextField(12);
JPasswordField JPF = new JPasswordField(12);
panel1.add(JTF);
panel2.add(JPF);
frame.setResizable(false);
frame.setVisible(true);
frame.setSize(300, 200);
frame.setLocation(300,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
button1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
new register();
frame.dispose();
}
});
}
public static void main(String[] args){
new login();
}
public void actionPerformed(ActionEvent e ){
}
}
I've this Actionlistener that change my previous panel into a second one, now I want to put a "Back" button in panel2 that take me back to panel1 maintaining its graphic setting.
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JFrame {
private static final long serialVersionUID = 1L;
public static void main(String[] args){
final JFrame Main = new JFrame("TEST");
Main.setVisible(true);
Main.setSize(600, 600);
Main.setLocationRelativeTo(null);
Main.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Adding JPanel
JPanel panel = new JPanel();
Main.add(panel);
//JPanel settings
panel.setLayout(null);
panel.setBackground(Color.GREEN);
//Adding JButton
JButton button = new JButton("Button 1");
JButton button2 = new JButton("Button2");
panel.add(button);
panel.add(button2);
//JButton settings
button.setBounds(70, 160, 200, 200);
button2.setBounds(320, 160, 200, 200);
//Button action
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JPanel panel2 = new JPanel();
//Panel2 settings
JButton button3 = new JButton("Back");
panel2.add(button3);
panel2.setBackground(Color.RED);
Main.getContentPane().removeAll();
Main.getContentPane().add(panel2);
Main.getContentPane().validate();
}
});
//Button action
button2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JPanel panel3 = new JPanel();
//Panel2 settings
JButton button3 = new JButton("Back");
panel3.add(button3);
panel3.setBackground(Color.YELLOW);
//Button action
button3.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
JPanel panel = new JPanel();
Main.getContentPane().removeAll();
Main.getContentPane().add(panel);
Main.getContentPane().validate();
}
});
Main.getContentPane().removeAll();
Main.getContentPane().add(panel3);
Main.getContentPane().validate();
}
});
}
}
I have created a JPanel that has all the JRadioButtons on it that I need (it is called PortSettings). I also have a button, called port settings, when the user clicks the button, I need the JPanel to come up and display the radio buttons. I have tried to add the JPanel to the actionlistener but it doesn't work. My code is below. I have deleted all other ActionListener's from the other buttons except for the portsettings buttons. If this question is confusing I'm sorry. It's really hard to explain what I need to do. I have uploaded a drawing of what the panel will look like as well as a screenshot of my program.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JTextArea text = new JTextArea();
JLabel logLabel = new JLabel("Input/Output Log");
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
JRadioButton rs = new JRadioButton("RS232");
JRadioButton usbcdc = new JRadioButton("USB_CDC");
JRadioButton usbhid = new JRadioButton("USB_HID");
JButton next = new JButton("Next");
JButton ok = new JButton("OK");
JButton cancel = new JButton("Cancel");
JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(cancel);
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
JButton amount = new JButton("Amount");
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel textPanel = new JPanel(new BorderLayout());
textPanel.add(logLabel);
frame.add(logLabel);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
I have tried to add a JFrame to the ActionListener then add the JPanel to the JFrame but nothing happens when I click the Port Settings button. Also, when I tried to add the JPanel to the JFrame it told me to put final in front of JPanel PortSettings = new JPanel();. Here is the code.
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JTextArea text = new JTextArea();
JLabel logLabel = new JLabel("Input/Output Log");
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
JRadioButton rs = new JRadioButton("RS232");
JRadioButton usbcdc = new JRadioButton("USB_CDC");
JRadioButton usbhid = new JRadioButton("USB_HID");
JButton next = new JButton("Next");
JButton ok = new JButton("OK");
JButton cancel = new JButton("Cancel");
final JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(cancel);
JPanel accountButton = new JPanel();
accountButton.add(ok);
accountButton.add(cancel);
JPanel apprvordecl = new JPanel();
apprvordecl.add(apprve);
apprvordecl.add(decline);
JPanel amountButton = new JPanel();
amountButton.add(ok);
amountButton.add(cancel);
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFrame port = new JFrame("Port Settings");
port.add(PortSettings);
frame.setVisible(true);
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
JButton amount = new JButton("Amount");
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel textPanel = new JPanel(new BorderLayout());
textPanel.add(logLabel);
frame.add(logLabel);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
You´re on the right track, but you do not want to add your PortSettings panel to a new JFrame but somewhere on your previously built one, assigned to the local variable frame. So your action listener should rather be
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
frame.add(PortSettings, BorderLayout.SOUTH);
frame.pack();
}
});
(This is assuming that you actually want to add it to the frame at that instant and not add it invisibly right from the start and turn it visible, like #Aleksei suggested.)
The error message about final is because you use PortSettings in an (anonymous) inner class - viz., the ActionListener. In my proposed modification the same goes for frame, so you need to adapt its declaration as well:
final JFrame frame = new JFrame();
The reason why is quite technical and beside the point right now: just do it.
If instead you want the panel to appear in a separate window, you need a JDialog for that, not a second JFrame:
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog dialog = new JDialog(frame);
dialog.add(PortSettings);
dialog.pack();
dialog.setVisible(true);
}
});
Take a look at the JOptionPane class for a rich choice of ways to get more functionality out of dialogs.
Just add the action listener to all your buttons.
like this:
yourButton.addActionListener(this);
Do that for all the buttons.
Then take your TestPalication class's actionPreformed method and do whatever:
#Override
public void actionPerformed(ActionEvent arg0) {
((JRadioButton) arg0.getSource()).setTitle("Clicked!");
}
Your question was a little bit confusing but I hope this clarifies a little bit.
I am trying to display the drawing that I have posted. When my code runs and the user clicks Account, the panel only displays the buttons "OK" and "Cancel" (see screenshot). I have added three JTextAreas with a JLabel for each to the panel accountPanel but they don't display. My code is below.
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Component;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JLabel input = new JLabel();
final JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.add(input);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
ethernet.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog esettings = new JDialog(frame);
esettings.setTitle("Ethernet Settings");
esettings.setSize(400, 400);
esettings.pack();
esettings.setVisible(true);
}
});
JRadioButton rs = new JRadioButton("RS232");
rs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog rsettings = new JDialog(frame);
rsettings.setTitle("RS232 Settings");
rsettings.setSize(400, 400);
rsettings.pack();
rsettings.setVisible(true);
}
});
JRadioButton usbcdc = new JRadioButton("USB_CDC");
usbcdc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog usbc = new JDialog(frame);
usbc.setTitle("USB_CDC Settings");
usbc.setSize(400, 400);
usbc.pack();
usbc.setVisible(true);
}
});
JRadioButton usbhid = new JRadioButton("USB_HID");
usbhid.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog usbh = new JDialog(frame);
usbh.setTitle("USB_HID Settings");
usbh.setSize(400, 400);
usbh.pack();
usbh.setVisible(true);
}
});
JButton next = new JButton("Next");
JButton aok = new JButton("OK");
JButton bok = new JButton("OK");
JButton cok = new JButton("OK");
JButton acancel = new JButton("Cancel");
JButton bcancel = new JButton("Cancel");
JButton ccancel = new JButton("Cancel");
JButton dcancel = new JButton("Cancel");
JLabel cardLabel = new JLabel("Card Number: ");
JLabel expLabel = new JLabel("Exp. Date: ");
JLabel cvvLabel = new JLabel("CVV: ");
JTextArea card = new JTextArea();
card.add(cardLabel);
JTextArea expDate = new JTextArea();
expDate.add(expLabel);
JTextArea cvv = new JTextArea();
cvv.add(cvvLabel);
final JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(bcancel);
final JPanel accountPanel = new JPanel();
accountPanel.add(bok);
accountPanel.add(ccancel);
accountPanel.add(card);
accountPanel.add(expDate);
accountPanel.add(cvv);
final JPanel apprvordecl = new JPanel();
apprvordecl.add(apprve);
apprvordecl.add(decline);
apprvordecl.add(aok);
apprvordecl.add(acancel);
final JPanel amountPanel = new JPanel();
amountPanel.add(cok);
amountPanel.add(dcancel);
input.setFont(new java.awt.Font("Tahoma", 3, 18));
input.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
input.setText("Input / Output Log");
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog port = new JDialog(frame);
port.setTitle("Port Settings");
port.setSize(400, 400);
port.add(PortSettings);
port.pack();
port.setVisible(true);
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
account.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog accountDialog = new JDialog(frame);
accountDialog.setTitle("Account");
accountDialog.setSize(400, 400);
accountDialog.add(accountPanel);
accountDialog.pack();
accountDialog.setVisible(true);
}
});
JButton amount = new JButton("Amount");
amount.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog amount2 = new JDialog(frame);
amount2.setTitle("Amount");
amount2.setSize(400, 400);
amount2.add(amountPanel);
amount2.pack();
amount2.setVisible(true);
}
});
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
approvordecl.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog apprv = new JDialog(frame);
apprv.setTitle("Approve / Decline");
apprv.setSize(400, 400);
apprv.add(apprvordecl);
apprv.pack();
apprv.setVisible(true);
}
});
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
ButtonGroup group = new ButtonGroup();
group.add(usbhid);
group.add(usbcdc);
group.add(ethernet);
group.add(rs);
ButtonGroup approvegroup = new ButtonGroup();
approvegroup.add(apprve);
approvegroup.add(decline);
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
JPanel uses FlowLayout by default which respects preferred sizes. The default width of the preferred size for the JTextArea's is 0 x 0. You need to give the JTextComponent's a preferred size for them to appear. Use the constructor that specifys rows & columns:
JTextArea card = new JTextArea(5, 10);
Don't forget to make the JTextArea scrollable by enclosing it in a JScrollPane:
accountPanel.add(new JScrollPane(card));
What's wrong with my code? The panel named 'leftPanel' is not showing up when i run the program whereas 'flightPanel
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TravelAgentSystem {
public static void main(String[] args){
JFrame mainFrame = new JFrame();
mainFrame.setLayout(new BorderLayout());
mainFrame.setTitle("Main Menu");
mainFrame.setVisible(true);
mainFrame.setSize(500,500);
mainFrame.setLocationRelativeTo(null);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel flightPanel = new JPanel();
flightPanel.setLayout(new GridLayout(2,2));
JButton timeb, priceb, hotelb, exitb;
timeb = new JButton("Time");
priceb = new JButton ("Price");
hotelb = new JButton ("Hotels Menu");
exitb = new JButton ("Exit Program");
class buttonHandler implements ActionListener{
public void actionPerformed(ActionEvent event) {
JButton clickedButton = (JButton)event.getSource();
String buttonText = clickedButton.getText();
if (buttonText.equals("Exit Program")) {System.exit(0);}
}
}
buttonHandler handler = new buttonHandler();
exitb.addActionListener(handler);
flightPanel.add(timeb);
flightPanel.add(priceb);
flightPanel.add(hotelb);
flightPanel.add(exitb);
mainFrame.add(flightPanel, BorderLayout.CENTER);
JPanel travelPanel = new JPanel();
travelPanel.setLayout(new GridLayout(2,2));
travelPanel.setVisible(true);
JPanel timePanel = new JPanel();
timePanel = new JPanel();
timePanel.setLayout(new GridLayout(2,1));
timePanel.setVisible(true);
JPanel leftPanel = new JPanel();
leftPanel.setLayout(new GridLayout(2,1));
leftPanel.setVisible(true);
JLabel Lfrom, Lto, LDeparture;
Lfrom = new JLabel("From");
Lto = new JLabel("To");
LDeparture = new JLabel("Departure Date (DD/MM/YY)");
String[] fromOptions = {"East Midlands","Birmingham","Heathrow","Manchester"};
String[] toOptions = {"New York", "Dahab", "Rome", "Sydney", "Tokyo"};
JComboBox fromDest = new JComboBox(fromOptions);
JComboBox toDest = new JComboBox(toOptions);
JPanel datePanel = new JPanel();
datePanel.setLayout(new FlowLayout()); // So i can fix size of dateField
JTextField dateField = new JTextField();
dateField.setPreferredSize(new Dimension(100,20));
datePanel.add(dateField);
travelPanel.add(Lfrom);
travelPanel.add(fromDest);
travelPanel.add(Lto);
travelPanel.add(toDest);
timePanel.add(LDeparture);
timePanel.add(datePanel);
leftPanel.add(travelPanel);
leftPanel.add(timePanel);
mainFrame.add(leftPanel, BorderLayout.EAST);
}
}
Call mainFrame.setVisible(true); in last. I.e,
mainFrame.add(leftPanel, BorderLayout.EAST);
mainFrame.setVisible(true);
Here's what I get :