Develop Reference

Anchor constraint in GridBagLayout not working

import java.awt.*;
import javax.swing.*;
public class GBLClumpingExample extends JFrame{
GBLClumpingExample(){
GridBagLayout g = new GridBagLayout();
GridBagConstraints gv = new GridBagConstraints();
GridBagLayout b = new GridBagLayout();
GridBagConstraints gc = new GridBagConstraints();
setVisible(true);
setSize(720,720);
setLayout(g);
JPanel p = new JPanel();
p.setLayout(b);
gv.fill = GridBagConstraints.BOTH;
add(p,gv);
Label l1 = new Label("Label 1");
Label l2 = new Label("Label 2");
Label l3 = new Label("Label 3");
Label l4 = new Label("Label 4");
Label l5 = new Label("Label 5");
gc.weightx =1.0;
gc.weighty = 1.0;
gc.gridx= 1;
gc.gridy= 1;
gc.anchor = GridBagConstraints.PAGE_START;
gc.gridx= -1;
gc.gridy= 0;
p.add(l1,gc);
gc.anchor = GridBagConstraints.SOUTH;
p.add(l2,gc);
gc.anchor = GridBagConstraints.EAST;
p.add(l3,gc);
gc.anchor = GridBagConstraints.WEST;
p.add(l4,gc);
gc.anchor = GridBagConstraints.CENTER;
p.add(l5,gc);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public static void main(String[] args){
GBLClumpingExample e = new GBLClumpingExample();
}
}
I was trying to use GridBagLayout but maybe it is not working correctly.
This is my code I don't know what is wrong but anchor constraints of GridBagConstraints are not working, they are all just clump together.

You are adding you components to a panel p which you are then adding to the frame (to its content pane) using add(p,gv);. The constraints in gv have been initialized with gv.fill = GridBagConstraints.BOTH;, but its weightx and weighty are left at their initial zero. As a result, this panel will stay at its preferred size and not receive additional space, so it has no additional space to distribute to its own content.
Since all labels have the same size, their anchors have no effect when there is no additional space.
When you change the line
gv.fill = GridBagConstraints.BOTH;
to
gv.fill = GridBagConstraints.BOTH;
gv.weightx = 1;
gv.weighty = 1;
you will see the effect of the anchors. Alternatively, you can get rid of the additional panel. There are other redundant operations too. You can simplify your code to:
import java.awt.*;
import javax.swing.*;
public class GBAnchorExample extends JFrame{
GBAnchorExample() {
Container c = super.getContentPane();
c.setLayout(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
gc.weightx = gc.weighty = 1.0;
JLabel l1 = new JLabel("Label 1");
JLabel l2 = new JLabel("Label 2");
JLabel l3 = new JLabel("Label 3");
JLabel l4 = new JLabel("Label 4");
JLabel l5 = new JLabel("Label 5");
gc.anchor = GridBagConstraints.PAGE_START;
c.add(l1,gc);
gc.anchor = GridBagConstraints.SOUTH;
c.add(l2,gc);
gc.anchor = GridBagConstraints.EAST;
c.add(l3,gc);
gc.anchor = GridBagConstraints.WEST;
c.add(l4,gc);
gc.anchor = GridBagConstraints.CENTER;
c.add(l5,gc);
super.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public static void main(String[] args) {
GBAnchorExample e = new GBAnchorExample();
e.setSize(720,720);
e.setVisible(true);
}
}
To visualize the actual effect of the anchor you may change the main method to
public static void main(String[] args){
GBAnchorExample e = new GBAnchorExample();
Component grid = new JComponent() {
#Override
protected void paintComponent(Graphics g) {
g.setColor(Color.GREEN);
int w = getWidth(), h = getHeight();
for(int i = 1; i < 5; i++) {
int x = (int)(w/5.0*i);
g.drawLine(x, 0, x, h);
}
}
};
e.setGlassPane(grid);
grid.setVisible(true);
e.setSize(720,720);
e.setVisible(true);
}
This will paint a green grid to show the logical cells containing the labels, so it becomes apparent how the anchors affect the labels’ positions within their cells.

If I understand the intent of this layout correctly (I'm not sure I do) then this might be done using a BorderLayout.
Here it is with more width and height:
The titled borders are only there to provide a quick visual reference to the constraint used to place the component. The (spacer) is only added to the 3 labels in the center row to allow the full TitledBorder to appear!
Here is the code:
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
public class BLNotClumpingExample {
private JComponent ui = null;
BLNotClumpingExample() {
initUI();
}
public void initUI() {
if (ui!=null) return;
ui = new JPanel(new BorderLayout(10,10));
ui.setBorder(new EmptyBorder(4,4,4,4));
ui.add(getLabel("Label 1", "PAGE_START"), BorderLayout.PAGE_START);
ui.add(getLabel("Label 2", "PAGE_END"), BorderLayout.PAGE_END);
ui.add(getLabel("Label 3 (spacer)", "LINE_END"), BorderLayout.LINE_END);
ui.add(getLabel("Label 4 (spacer)", "LINE_START"), BorderLayout.LINE_START);
ui.add(getLabel("Label 5 (spacer)", "CENTER"), BorderLayout.CENTER);
}
private JLabel getLabel(String text, String constraint) {
JLabel l = new JLabel(text, SwingConstants.CENTER);
l.setBorder(new TitledBorder(constraint));
return l;
}
public JComponent getUI() {
return ui;
}
public static void main(String[] args) {
Runnable r = () -> {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception useDefault) {
}
BLNotClumpingExample o = new BLNotClumpingExample();
JFrame f = new JFrame(o.getClass().getSimpleName());
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.setContentPane(o.getUI());
f.pack();
f.setMinimumSize(f.getSize());
f.setVisible(true);
};
SwingUtilities.invokeLater(r);
}
}

Java not able to close the JFrame

I am not able to close my frame after I click the button. The tricky part is that I do not need to quit the whole application, just close the GUI (not with system exit).
Would you be able to assist me?
Thank you in advance!!!
Main.java
public class Main {
public static void main(String[] args) {
System.setProperty("webdriver.gecko.driver", "C:/geckodriver.exe");
WebDriver driver = new FirefoxDriver();
driver.get("https://my.emerchantpay.com/");
eMerchantPay emp = PageFactory.initElements(driver, eMerchantPay.class);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame frame = new MainFrame("Please enter your credentials");
frame.setSize(500, 400);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
MainFrame.java
public class MainFrame extends JFrame {
private DetailsPanel detailsPanel;
public MainFrame(String title) {
super(title);
// Set layout manager
setLayout(new BorderLayout());
// Create Swing components
final JTextArea textArea = new JTextArea();
detailsPanel = new DetailsPanel();
detailsPanel.addDetailsListener(new DetailListener() {
public void detailEventOccured(DetailEvent event) {
String text = event.getText();
textArea.append(text);
}
});
// Add Swing components to content pane
Container c = getContentPane();
//c.add(textArea, BorderLayout.CENTER);
c.add(detailsPanel, BorderLayout.CENTER);
}
DetailsPanel.java
public class DetailsPanel extends JPanel{
private static final long serialVersionUID = 1234567891;
private EventListenerList listenerList = new EventListenerList();
public DetailsPanel() {
Dimension size = getPreferredSize();
size.width = 250;
setPreferredSize(size);
setBorder(BorderFactory.createTitledBorder("Personal Details"));
JLabel nameLabel = new JLabel("Name: ");
JLabel passwordLabel = new JLabel("Password: ");
final JTextField nameField = new JTextField(10);
final JPasswordField passwordField = new JPasswordField(10);
JButton addBtn = new JButton("Submit");
addBtn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(java.awt.event.ActionEvent e) {
String name = nameField.getText();
String password = passwordField.getText();
String text = name + ": " + password + "\n";
System.out.println (text);
}
});
setLayout(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
/// First column ///
gc.anchor = GridBagConstraints.LINE_END;
gc.weightx = 0.5;
gc.weighty = 0.5;
gc.gridx = 0;
gc.gridy = 0;
add(nameLabel, gc);
gc.gridx = 0;
gc.gridy = 1;
add(passwordLabel, gc);
/// Second column ///
gc.anchor = GridBagConstraints.LINE_START;
gc.gridx = 1;
gc.gridy = 0;
add(nameField, gc);
gc.gridx = 1;
gc.gridy = 1;
add(passwordField, gc);
/// Final row ///
gc.weighty = 10;
gc.anchor = GridBagConstraints.FIRST_LINE_START;
gc.gridx = 1;
gc.gridy = 2;
add(addBtn, gc);
}
public void fireDetailEvent(DetailEvent event) {
Object[] listeners = listenerList.getListenerList();
for (int i=0; i < listeners.length; i += 2) {
if (listeners[i] == DetailListener.class) {
((DetailListener)listeners[i+1]).detailEventOccured(event);
}
}
}
public void addDetailsListener(DetailListener listener) {
listenerList.add(DetailListener.class, listener);
}
public void removeDetailListener(DetailListener listener) {
listenerList.remove(DetailListener.class, listener);
}
I need to close the frame once I click the login button in this piece of code:
addBtn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(java.awt.event.ActionEvent e) {
String name = nameField.getText();
String password = passwordField.getText();
String text = name + ": " + password + "\n";
System.out.println (text);
}
});

In actionPerformed, add these lines to obtain and close the parent frame :
JFrame frame = (JFrame) SwingUtilities.getWindowAncestor(addBtn);
frame.dispose();// or frame.setVisible(false), depending on your needs
Note that you will have to declare your button final in order to use it in the anonymous listener :
final JButton addBtn = new JButton("Submit");

Fixed size of buttons

There is a JPanel with buttons and textField. TextField filters unnecessary buttons by name. But after delete the size of rest buttons is changing.
The height of buttons must not change after filtering in the textField. How to achieve this?
public class TestViewer {
public static void main(String[] args) {EventQueue.invokeLater(new Runnable() {
public void run() {
JDialog dialog = new TestDialog();
dialog.setLocationRelativeTo(null);
dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
dialog.setTitle("Type text and press Enter");
dialog.setSize(300, 700);
dialog.setVisible(true);
dialog.setLocationRelativeTo(null);
dialog.setModal(true);
}
});
}
}
class TestDialog extends JDialog {
public TestDialog() {
getContentPane().add(new JPan
el(), BorderLayout.CENTER);
getContentPane().add(createBtnPanel(), BorderLayout.CENTER);
}
private JPanel createBtnPanel() {
int n = 100;
Final String ArrButtonNames[] = new String[n];
for (int h = 0; h < ArrButtonNames.length; h++) {
if ((h%2)==0){
ArrButtonNames[h]="Filter"+h;
}
else{
ArrButtonNames[h]="Button"+h;
}
}
final JButton ArrButton[] = new JButton[n];
final JPanel btnPanel = new JPanel(new GridLayout(0, ArrButtonNames.length, 1,1));
btnPanel.setLayout(new GridLayout(0, 1));
final JTextField textField = new JTextField();
textField.setColumns(23);
btnPanel.add(textField);
for (int i = 0; i < ArrButtonNames.length; i++) {
String btnString = ArrButtonNames[i];
JButton button = new JButton(btnString);
Dimension d = button.getPreferredSize();
d.setSize(d.getWidth(), d.getHeight()*1);
button.setPreferredSize(d);
button.setSize(d);
button.setMinimumSize(d);
button.setMaximumSize(d);
btnPanel.add(button);
ArrButton[i] = button;
}
textField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for(int k = 0; k < ArrButtonNames.length; k++) {
if(ArrButtonNames[k].indexOf(textField.getText())==-1) {
btnPanel.remove(ArrButton[k]);
btnPanel.revalidate();
btnPanel.repaint();
}
}
}
});
JPanel MainPanel = new JPanel();
MainPanel.setLayout(new BorderLayout());
MainPanel.add(btnPanel, BorderLayout.NORTH);
final JScrollPane scrollPane = new JScrollPane(btnPanel);
MainPanel.add(scrollPane, BorderLayout.CENTER);
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
return MainPanel;
}
}

You have that effect, because you use GridLayout, which resize components to fill whole cell.
For your purposes I recommend you to use GridBagLayout, that can do what you want.
Try to use next code for filling your btnPanel instead of yours:
final JButton ArrButton[] = new JButton[n];
final JPanel btnPanel = new JPanel();
GridBagConstraints c = new GridBagConstraints();
c.anchor = GridBagConstraints.WEST;
c.fill = GridBagConstraints.HORIZONTAL;
c.weightx = 1;
c.gridx=0;
c.gridy=0;
btnPanel.setLayout(new GridBagLayout());
final JTextField textField = new JTextField();
btnPanel.add(textField,c);
for (int i = 0; i < ArrButtonNames.length; i++) {
String btnString = ArrButtonNames[i];
JButton button = new JButton(btnString);
c.gridy ++;
btnPanel.add(button,c);
ArrButton[i] = button;
}
c.fill = GridBagConstraints.BOTH;
c.weighty = 1;
c.gridy ++;
btnPanel.add(new JLabel(""),c);
And it looks like:
ALso use pack() method instead of setSize(...), and don't use setPreferedSize(...) and others size methods read about that here.

Java- CardLayout how to switch cards from the card that is switching

I am trying to get familiar with CardLayout so I am making a mock game menu. This menu should have three buttons, but that layout part is easy.
So, what I want to do is start it with a menu with three buttons. The single player button should change what the user sees to a single button, which can change it back to the original menu.
I followed an example online and then applied the same methods to this. However, the menu itself is a card and it's where the command to change cards will come from, not a separate container.
Whenever I run this i get an error:
public class GameMenuCards extends JFrame{
private int currentCard = 1;
private JPanel cardPanel;
private CardLayout cl;
private GridBagConstraints gbc;
public GameMenuCards(){
initUI();
}
public void initUI(){
//set the properties for the window
setTitle("Game Menu With Cards");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setExtendedState(MAXIMIZED_BOTH);
cardPanel = new JPanel();
cl = new CardLayout();
JPanel game = new JPanel();
game.setBackground(Color.BLACK);
//the menu panel
JPanel menu = new JPanel();
menu.setLayout(new GridBagLayout());
menu.setBackground(Color.BLACK);
cardPanel.add(menu, "1");
cardPanel.add(game, "2");
//set up the buttons for the menu
JButton single = new JButton("Single Player");
single.setPreferredSize(new Dimension(300, 30));
single.setBackground(Color.GRAY);
single.setForeground(Color.CYAN);
single.setBorder(BorderFactory.createLineBorder(Color.CYAN, 3));
JButton multi = new JButton("Multi Player");
multi.setPreferredSize(new Dimension(300, 30));
multi.setBackground(Color.GRAY);
multi.setForeground(Color.CYAN);
multi.setBorder(BorderFactory.createLineBorder(Color.CYAN, 3));
JButton score = new JButton("High Scores");
score.setPreferredSize(new Dimension(300, 30));
score.setBackground(Color.GRAY);
score.setForeground(Color.CYAN);
score.setBorder(BorderFactory.createLineBorder(Color.CYAN, 3));
gbc = new GridBagContraints();
//add everything to the menu
gbc.insets = new Insets(35, 50, 0, 50);
gbc.gridwidth = 1;
gbc.gridheight = 1;
gbc.gridx = 1;
gbc.gridy = 1;
menu.add(single, gbc);
gbc.gridx = 1;
gbc.gridy = 2;
label(menu);
gbc.gridx = 1;
gbc.gridy = 3;
menu.add(multi, gbc);
gbc.gridx = 1;
gbc.gridy = 4;
label(menu);
gbc.gridx = 1;
gbc.gridy = 5;
gbc.insets = new Insets(35, 50, 35, 50);
menu.add(score, gbc);
single.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event){
currentCard = 2;
cl.show(cardPanel, "" + (currentCard));
}
});
JButton returnBut = new JButton("Back To Menu");
returnBut.setPreferredSize(new Dimension(300, 30));
returnBut.setBackground(Color.GRAY);
returnBut.setForeground(Color.CYAN);
returnBut.setBorder(BorderFactory.createLineBorder(Color.CYAN, 3));
returnBut.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event){
currentCard = 1;
cl.show(cardPanel, "" + (currentCard));
}
});
game.add(returnBut);
getContentPane().add(cardPanel);
}
public void label(Container c){
JLabel j1 = new JLabel();
j1.setPreferredSize(new Dimension(300, 40));
j1.setBackground(Color.BLACK);
c.add(j1, gbc);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
GameMenuCards gm = new GameMenuCards();
gm.setVisible(true);
}
});
}
}
I know that i could have done a similar thing with the buttons to the labels but i only had the thought two buttons in, so at that stage it would have taken longer.
Am I going about this the right way? Can you correct any mistakes I've made in the code?

Whenever I run this i get an error
Your application is throwing an NPE here
gbc.insets = new Insets(35, 50, 0, 50);
as you haven't initialized your GridBagConstraints gbc.
Also, the reason that you see both panels side-by-side is that, even though you created a CardLayout, you neglect to use it for your cardPanel. Therefore you are still using the default FlowLayout of the JPanel. You could do:
cardPanel = new JPanel(cl);

Swing: Panel Size Issue

I am designing an application, in which there should be 5 different JPanels containing different Swing components. For the JRadioButton part, I ran into an issue for which couldn't find proper solution. The 'radioSizePanel' is supposed to be placed somewhere in upper middle of the main panel. Has anyone solved this problem before ? Here is the code, that I am using :
import java.awt.*;
import javax.swing.*;
public class PizzaShop extends JFrame
{
private static final long serialVersionUID = 1L;
private JRadioButton[] radio_size = new JRadioButton[3];
private JRadioButton[] radio_type = new JRadioButton[3];
public PizzaShop()
{
initializaUI();
}
private void initializaUI()
{
setSize(700, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Panel container to wrap checkboxes and radio buttons
JPanel panel = new JPanel();
//sizes radio buttons
String Size[] = {"Small: $6.50", "Medium: $8.50", "Large: $10.00"};
JPanel radioSizePanel = new JPanel(new GridLayout(3, 1));
ButtonGroup radioSizeGroup = new ButtonGroup();
for (int i=0; i<3; i++)
{
radio_size[i] = new JRadioButton(Size[i]);
radioSizePanel.add(radio_size[i]);
radioSizeGroup.add(radio_size[i]);
}
radioSizePanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), "Size"));
radioSizePanel.setPreferredSize(new Dimension(100, 200));
//
panel.add(radioSizePanel);
setContentPane(panel);
setContentPane(radioSizePanel);
}
public static void main(String[] args)
{
// TODO Auto-generated method stub
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new PizzaShop().setVisible(true);
}
});
}
}
Here is what I want as an expected OUTPUT :

Please do watch the code example and Please do watch everything carefully , the sequence of adding things to the JFrame. Since in your example you calling setSize() much before something has been added to the JFrame, hence first add components to the container, and then call it's pack()/setSize() methods, so that it can realize that in a good way.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class PizzaLayout
{
/*
* Five JPanels we will be using.
*/
private JPanel headerPanel;
private JPanel footerPanel;
// This JPanel will contain the middle components.
private JPanel centerPanel;
private JPanel toppingPanel;
private JPanel sizePanel;
private JPanel typePanel;
private JPanel buttonPanel;
private String[] toppings = {
"Tomato",
"Green Pepper",
"Black Olives",
"Mushrooms",
"Extra Cheese",
"Pepproni",
"Sausage"
};
private JCheckBox[] toppingsCBox;
private String[] sizePizza = {
"Small $6.50",
"Medium $8.50",
"Large $10.00"
};
private JRadioButton[] sizePizzaRButton;
private String[] typePizza = {
"Thin Crust",
"Medium Crust",
"Pan"
};
private JRadioButton[] typePizzaRButton;
private JButton processButton;
private ButtonGroup bGroupType, bGroupSize;
private JTextArea orderTArea;
private StringBuilder sBuilderOrder;
private void displayGUI()
{
JFrame frame = new JFrame("Pizza Shop");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
/*
* This JPanel is the base of all the
* other components, and at the end
* we will set this as Content Pane
* for the JFrame.
*/
JPanel contentPane = new JPanel();
contentPane.setLayout(new BorderLayout(5, 5));
contentPane.setBorder(
BorderFactory.createEmptyBorder(10, 10, 10, 10));
/*
* TOP PART of the LAYOUT.
*/
headerPanel = new JPanel();
JLabel headerLabel = new JLabel(
"Welcome to Home Style Pizza Shop"
, JLabel.CENTER);
headerLabel.setForeground(Color.RED);
headerPanel.add(headerLabel);
/*
* CENTER PART of the LAYOUT.
*/
centerPanel = new JPanel();
centerPanel.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.FIRST_LINE_START;
gbc.fill = GridBagConstraints.BOTH;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = 2;
gbc.weightx = 0.3;
gbc.weighty = 1.0;
/*
* Above Constraints are for this part.
*/
toppingPanel = new JPanel();
toppingPanel.setBorder(
BorderFactory.createTitledBorder(
BorderFactory.createLineBorder(Color.RED),
"Each Topping $1.50"));
JPanel checkBoxesPanel = new JPanel();
checkBoxesPanel.setBorder(
BorderFactory.createEmptyBorder(5, 5, 5, 5));
checkBoxesPanel.setLayout(new GridLayout(0, 1, 5, 5));
toppingsCBox = new JCheckBox[toppings.length];
for (int i = 0; i < toppings.length; i++)
{
toppingsCBox[i] = new JCheckBox(toppings[i]);
checkBoxesPanel.add(toppingsCBox[i]);
}
toppingPanel.add(checkBoxesPanel);
centerPanel.add(toppingPanel, gbc);
// Till this.
gbc.gridx = 1;
gbc.gridheight = 1;
gbc.weighty = 0.7;
/*
* Above Constraints are for this part.
*/
sizePanel = new JPanel();
sizePanel.setBorder(
BorderFactory.createTitledBorder(
BorderFactory.createLineBorder(Color.RED),
"Pizza Size"));
JPanel radioBoxesPanel = new JPanel();
radioBoxesPanel.setBorder(
BorderFactory.createEmptyBorder(5, 5, 5, 5));
radioBoxesPanel.setLayout(new GridLayout(0, 1, 10, 10));
sizePizzaRButton = new JRadioButton[sizePizza.length];
bGroupSize = new ButtonGroup();
for (int i = 0; i < sizePizza.length; i++)
{
sizePizzaRButton[i] = new JRadioButton(sizePizza[i]);
bGroupSize.add(sizePizzaRButton[i]);
radioBoxesPanel.add(sizePizzaRButton[i]);
}
sizePanel.add(radioBoxesPanel);
centerPanel.add(sizePanel, gbc);
// Till this.
gbc.gridx = 2;
gbc.weighty = 0.7;
/*
* Above Constraints are for this part.
*/
typePanel = new JPanel();
typePanel.setBorder(
BorderFactory.createTitledBorder(
BorderFactory.createLineBorder(Color.RED),
"Pizza Type"));
JPanel radioBoxesTypePanel = new JPanel();
radioBoxesTypePanel.setBorder(
BorderFactory.createEmptyBorder(5, 5, 5, 5));
radioBoxesTypePanel.setLayout(new GridLayout(0, 1, 10, 10));
typePizzaRButton = new JRadioButton[typePizza.length];
bGroupType = new ButtonGroup();
for (int i = 0; i < typePizza.length; i++)
{
typePizzaRButton[i] = new JRadioButton(typePizza[i]);
bGroupType.add(typePizzaRButton[i]);
radioBoxesTypePanel.add(typePizzaRButton[i]);
}
typePanel.add(radioBoxesTypePanel);
centerPanel.add(typePanel, gbc);
// Till this.
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weighty = 0.3;
gbc.gridwidth = 2;
processButton = new JButton("Process Selection");
processButton.addActionListener(
new ActionListener()
{
#Override
public void actionPerformed(ActionEvent ae)
{
sBuilderOrder = new StringBuilder();
sBuilderOrder.append("Pizza type : ");
for (int i = 0; i < typePizza.length; i++)
{
if (typePizzaRButton[i].isSelected())
sBuilderOrder.append(typePizzaRButton[i].getText());
}
sBuilderOrder.append("\n");
sBuilderOrder.append("Pizza Size : ");
for (int i = 0; i < sizePizza.length; i++)
{
if (sizePizzaRButton[i].isSelected())
sBuilderOrder.append(sizePizzaRButton[i].getText());
}
sBuilderOrder.append("\n");
sBuilderOrder.append("Toppings : ");
/*
* I hope you can do this part yourself now :-)
*/
orderTArea.setText(sBuilderOrder.toString());
}
});
centerPanel.add(processButton, gbc);
footerPanel = new JPanel();
footerPanel.setLayout(new BorderLayout(5, 5));
footerPanel.setBorder(
BorderFactory.createTitledBorder("Your Order : "));
orderTArea = new JTextArea(10, 10);
footerPanel.add(orderTArea, BorderLayout.CENTER);
contentPane.add(headerPanel, BorderLayout.PAGE_START);
contentPane.add(centerPanel, BorderLayout.CENTER);
contentPane.add(footerPanel, BorderLayout.PAGE_END);
frame.setContentPane(contentPane);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
#Override
public void run()
{
new PizzaLayout().displayGUI();
}
});
}
}
Here is the output of the same :