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Multiple documents with the same JTable

I am developing a Java Application that uses a JTable for capturing user input. The user will have to print data captured in the table. I would want the user to open multiple documents to work on. This I have implemented it this way: I have my JFrame as my main window; on to this JFrame, I have added JTabbedPane so that the user can switch between File, Settings and Tools.Upon clicking new File, the user is taken to a JTabbedPane(place at the center of the JFrame) with a JTable for input. I would want that the next time the user click new File, a new JPanel would be added to the JTabbledPane; but this new JPanel should also contain the JTable for input.This behavior should continue everytime the user creates a new File. This is shown in the images that I have uploaded.(Please forgive for poor drawing).
I have achied this by this code:
public final class QuotPane {
//components to be used
JFrame frame;
JTabbedPane tabbedPane,tablePane;
JPanel quotPane, topPane, pane1, pane2, pane3,tablePanel;
JSeparator sep;
JButton newFile;
QuotPane() {
this.createQuotPane();
this.createGUI();
ButtonActionListener lits= new ButtonActionListener();
newFile.addActionListener(lits);
}
public void createGUI() {
tabbedPane = new JTabbedPane();
tabbedPane.addTab("Create Quot", quotPane);
frame = new JFrame("Qout Interface");
frame.setSize(new Dimension(700, 650));
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
//adding the tabbed pane to the frmae
frame.add(tabbedPane, BorderLayout.NORTH);
}
public void createQuotPane() {
quotPane = new JPanel();
quotPane.setLayout(new BorderLayout());
//creating the top pane
topPane = new JPanel();
topPane.setPreferredSize(new Dimension(650, 145));
topPane.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED, Color.lightGray, Color.lightGray, Color.white, Color.orange));
topPane.setLayout(new MigLayout());
//add the top pane on the quot panel
quotPane.add(topPane, BorderLayout.NORTH);
//adding the panes on the top pane
this.createPanels();
topPane.add(pane1);
topPane.add(pane2);
topPane.add(pane3);
}
//a method to create panes for options
public void createPanels() {
pane1 = new JPanel();
pane1.setPreferredSize(new Dimension(200, 140));
pane1.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED, Color.BLUE, Color.lightGray, Color.white, Color.orange));
//lets set the icons then
pane1.setLayout(new MigLayout());
Icon fileIcon = new ImageIcon(this.getClass().getResource("/images/fil.jpg"));
newFile = new JButton(fileIcon);
pane1.add(new JLabel("New File"), "wrap");
pane1.add(newFile,"width 20!");
pane2 = new JPanel();
pane2.setPreferredSize(new Dimension(200, 140));
pane2.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED, Color.BLUE, Color.lightGray, Color.white, Color.orange));
pane3 = new JPanel();
pane3.setPreferredSize(new Dimension(200, 140));
pane3.setMaximumSize(new Dimension(300, 140));
pane3.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED, Color.BLUE, Color.lightGray, Color.white, Color.orange));
}
public static void main(String[] args) {
QuotPane qp = new QuotPane();
}
public void createTablePane(){
tablePanel= new JPanel();
}
class ButtonActionListener implements ActionListener{
protected int count=0;
#Override
public void actionPerformed(ActionEvent e) {
if(count==0){
if(e.getSource().equals(QuotPane.this.newFile)){
tablePane=new JTabbedPane();
QuotPane.this.createTablePane();
tablePane.addTab("New Qout", tablePanel);
frame.add(tablePane,BorderLayout.CENTER);
count ++;
}
}else if(count>0)
{
tablePane.add("New Quote",new JPanel());
}}}}
The challenge I am facing here is that I cannot add my JTable to every panel created at run time.I have tried this: tablePane.add("New Quote",myCreatedBeforePanleWithTable) but it is overriding the previous tab.
Here are images of things that I want.I read about JDeskTopPane and JInternalFrame, but can't figure out how to make it work the way I want.
How do I make it work the way I want as shown in the image?

Unfortunately, a Swing Component can only have a single parent. If you add Component A to JPanel X and then to JPanel Y, it will end up in Y.
You will need to have three separate JTables, all sharing a single TableModel. This should be fairly straightforward to implement the basic functionality. It might get tricky if you allow sorting and column reordering and you want that to affect all 3 tables.

JButtons only appear on JFrame if in BorderLayout.CENTER, not SOUTH or NORTH

So I'm trying to create a gui, I've tinkered with gui's before in java but I'm still new to them. So my issued here is that my JLabels (butLabel & cbLabel) are filled with buttons and checkboxes. Sadly my JFrame will only show whichever is set to the BorderLayout.CENTER. NORTH & SOUTH don't ever show, even if I only set the butLabel to SOUTH and don't even use the cbLabel. What am I overlooking?? It's much appreciated, thanks!
public class mainWindow
{
JFrame frame = new JFrame("Main Window");
JLabel butLabel = new JLabel();
JLabel cbLabel = new JLabel();
JButton showBut = new JButton("Show");
JButton exitBut = new JButton("Exit");
JButton addBut = new JButton("Add");
JButton remBut = new JButton("Remove");
JCheckBox aCB = new JCheckBox("Airplane");
JCheckBox bCB = new JCheckBox("Boat");
JCheckBox cCB = new JCheckBox("Clock");
public mainWindow()
{
frame.setLayout(new BorderLayout()); //I know this is set by default to BorderLayout but I just did it when I was out of options to try.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setMinimumSize(new Dimension(360, 480));
butLabel.setLayout(new GridLayout(1,4));
cbLabel.setLayout(new GridLayout(2, 2));
butLabel.add(showBut);
butLabel.add(exitBut);
butLabel.add(addBut);
butLabel.add(remBut);
cbLabel.add(aCB);
cbLabel.add(bCB);
cbLabel.add(cCB);
frame.add(butLabel, BorderLayout.CENTER);
frame.add(cbLabel, BorderLayout.NORTH);
}
public void setVisible()
{
butLabel.setVisible(true);//Didn't think I needed butLabel.setVisible or the cbLabel.setVisible but
cbLabel.setVisible(true);//again I was trying things that I thought might make sense.
frame.setVisible(true);
}
}

do not use Label for grouping elements, use JPanel instead
I have tried replace all
Label
with
Panel
it works

How to add multiple JPanels to JFrame with different sizes

I tried to do this from stackoverflow:
adding multiple jPanels to jFrame
But that didn't seem to work out like in the example, could anyone tell me what im doing wrong?
Im trying to add multiple JPanels with each their own sizes to the JFrame. I was also hoping it was possible to give each JPanel specific sizes and ability to put them on the exact spot i want.
Picture of what i try to make:
This is my code so far:
public ReserveringenGUI(ReserveringController controller) {
this.controller = new ReserveringController();
makeFrame();
}
public void makeFrame() {
JFrame frame1 = new JFrame();
frame1.setTitle("Reserveringen");
frame1.setSize(800, 500);
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel container = new JPanel();
container.setLayout(new BoxLayout(container, BoxLayout.X_AXIS));
JPanel willekeurigPanel = new JPanel();
willekeurigPanel.setSize(400, 500);
willekeurigPanel.setBackground(Color.YELLOW);
willekeurigPanel.setVisible(true);
JPanel overzichtPanel = new JPanel();
overzichtPanel.setSize(400, 500);
overzichtPanel.setBackground(Color.red);
overzichtPanel.setVisible(true);
DateFormat format = new SimpleDateFormat("dd-MM-yyyy");
DateFormatter df = new DateFormatter(format);
JFormattedTextField dateBeginField = new JFormattedTextField(df);
dateBeginField.setPreferredSize(new Dimension(250, 20));
dateBeginField.setValue(new Date());
JFormattedTextField dateEndField = new JFormattedTextField(df);
dateEndField.setPreferredSize(new Dimension(250, 20));
dateEndField.setValue(new Date());
JTextField klantnummer = new JTextField();
klantnummer.setPreferredSize(new Dimension(250, 20));
JTextField artikelnummer = new JTextField();
artikelnummer.setPreferredSize(new Dimension(250, 20));
JLabel dateBeginLabel = new JLabel("Begin Datum ");
JLabel dateEndLabel = new JLabel("Eind datum: ");
JLabel klantID = new JLabel("Klant nummer: ");
JLabel artikelID = new JLabel("Artikel nummer: ");
JButton voegReserveringToe = new JButton("Voeg toe");
voegReserveringToe.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
voegReserveringToeActionPerformed(evt);
}
});
willekeurigPanel.add(dateBeginLabel);
willekeurigPanel.add(dateBeginField);
willekeurigPanel.add(dateEndLabel);
willekeurigPanel.add(dateEndField);
willekeurigPanel.add(klantID);
willekeurigPanel.add(klantnummer);
willekeurigPanel.add(artikelID);
willekeurigPanel.add(artikelnummer);
willekeurigPanel.add(voegReserveringToe);
container.add(willekeurigPanel);
container.add(overzichtPanel);
frame1.add(container);
frame1.setVisible(true);
}

As discussed here, don't set the size and position of components arbitrarily. Instead, let the layout do the work, nesting as required. Use the GroupLayout shown here for the labeled input fields. Add each to the CENTER of a panel having BorderLayout, with a button in the SOUTH on the left. Finally, add both panels to an enclosing panel having GridLayout(1, 0).

How to align JPanel in java

I have a JPanel which is in a box layout but I am unsure how to align the JPanel to center of the window (and stay centered even if window is resized) I've tried looking for a solution but all questions seem over complicated compared to what it is that I'm looking for.
import java.awt.*;
import javax.swing.*;
public class Stacker extends JFrame {
public Stacker() {
super("Stacker");
setSize(430, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// create top panel
JPanel commandPane = new JPanel();
BoxLayout vertical = new BoxLayout(commandPane,
BoxLayout.Y_AXIS);
commandPane.setLayout(vertical);
JButton subscribe = new JButton("Subscribe");
JButton unsubscribe = new JButton("Unsubscribe");
JButton refresh = new JButton("Refresh");
JButton save = new JButton("Save");
commandPane.add(subscribe);
commandPane.add(unsubscribe);
commandPane.add(refresh);
commandPane.add(save);
JMenuItem j1 = new JMenuItem("File");
JMenuItem j2 = new JMenuItem("Open");
JMenuItem j3 = new JMenuItem("Close");
JMenuBar menubar = new JMenuBar();
JMenu menu = new JMenu("Feeds");
menu.add(j1);
menu.add(j2);
menu.add(j3);
menubar.add(menu);
setJMenuBar(menubar);
// create bottom panel
/*JPanel textPane = new JPanel();
JTextArea text = new JTextArea(4, 70);
JScrollPane scrollPane = new JScrollPane(text);
// put them together
FlowLayout flow = new FlowLayout();
setLayout(flow);
add(commandPane);
add(scrollPane); */
setJMenuBar(menubar);
add(commandPane);
setVisible(true);
}
public static void main(String[] arguments) {
Stacker st = new Stacker();
}
}

You say you're using a BoxLayout, but is the JPanel with the BoxLayout the JPanel you want to center, or does it contain the JPanel you want to center?
If it contains the JPanel you want to center, then you can add a glue on either side of the JPanel to be centered. If it is the JPanel you want to center, then you can use GridBagLayout or BoxLayout to achieve the effect you're talking about.
Googling something like "Java center component" will give you a ton of results.

for this idea (still not clear from your description) use GridBagLayout without set for GridBagConstraints
.
.
.
import java.awt.*;
import javax.swing.*;
public class CenteredJPanel {
private JFrame frame = new JFrame("Test");
private JPanel panel = new JPanel();
private JButton subscribe = new JButton("Subscribe");
private JButton unsubscribe = new JButton("Unsubscribe");
private JButton refresh = new JButton("Refresh");
private JButton save = new JButton("Save");
public CenteredJPanel() {
panel.setLayout(new GridBagLayout());
panel.add(subscribe);
panel.add(unsubscribe);
panel.add(refresh);
panel.add(save);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
CenteredJPanel centeredJLabel = new CenteredJPanel();
}
});
}
}

GUI not showing as intended

I'm trying to draw a gui like shown in the figure, but somehow I'm not able to place the objects in right place (I guess that the problem is with the layout) the textArea is suppose to go in the middle... but is not showing at all
package Chapter22Collections;
import javax.swing.*;
import java.awt.*;
public class Exercise226 extends JFrame {
private JButton jbSort;
private JButton jbReverse;
private JButton jbAdd;
private JButton jbShuffle;
private JLabel jlAddnum;
private JTextArea jTextDisplay;
private JTextField jTextAdd;
public Exercise226() {
jbSort = new JButton("Sort");
jbReverse = new JButton("Reverse");
jbShuffle = new JButton("Shuffle");
jbAdd = new JButton("Add");
jlAddnum = new JLabel("Add number here: ");
jTextDisplay = new JTextArea();
jTextAdd = new JTextField(8);
setLayout(new BorderLayout());
JPanel p1 = new JPanel(new GridLayout(1,3));
p1.add(jlAddnum);
p1.add(jTextAdd);
p1.add(jbAdd);
JPanel p2 = new JPanel(new GridLayout(1,3));
p2.add(jbSort);
p2.add(jbReverse);
p2.add(jbShuffle);
add(p1, BorderLayout.NORTH);
add(jTextDisplay, BorderLayout.CENTER);
add(p2, BorderLayout.SOUTH);
}
public static void main(String... args) {
Exercise226 gui = new Exercise226();
gui.setTitle("Numbers");
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setSize(300, 200);
gui.setLocationRelativeTo(null);
gui.setVisible(true);
}
}

The JTextArea is actually where you expect it to be but has no outline border. It is usual to place the component in a JScrollPane which will give this effect:
add(new JScrollPane(jTextDisplay), BorderLayout.CENTER);
or simply
add(new JScrollPane(jTextDisplay));

To make the textArea re-size with the window, try BoxLayout. Box is "A lightweight container that uses a BoxLayout object as its layout manager."
Box p1 = new Box(BoxLayout.X_AXIS);

How could I add spacing/padding between the elements in the frame? So the text area is more visible and centered.
Borders and padding. E.G.
Compared with:
import javax.swing.*;
import java.awt.*;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;
public class Exercise226 {
private JButton jbSort;
private JButton jbReverse;
private JButton jbAdd;
private JButton jbShuffle;
private JLabel jlAddnum;
private JTextArea jTextDisplay;
private JTextField jTextAdd;
private JPanel gui;
public Exercise226() {
gui = new JPanel(new BorderLayout(5,5));
jbSort = new JButton("Sort");
jbReverse = new JButton("Reverse");
jbShuffle = new JButton("Shuffle");
jbAdd = new JButton("Add");
jlAddnum = new JLabel("Add number here: ");
// set the size constraints using columns/rows
jTextDisplay = new JTextArea("Here I am!", 6,20);
jTextAdd = new JTextField(8);
JPanel p1 = new JPanel(new GridLayout(1,3,3,3));
p1.add(jlAddnum);
p1.add(jTextAdd);
p1.add(jbAdd);
JPanel p2 = new JPanel(new GridLayout(1,3,3,3));
p2.add(jbSort);
p2.add(jbReverse);
p2.add(jbShuffle);
JPanel textAreaContainer = new JPanel(new GridLayout());
textAreaContainer.add(new JScrollPane(jTextDisplay));
textAreaContainer.setBorder(new TitledBorder("Text Area Here"));
gui.add(p1, BorderLayout.PAGE_START);
gui.add(textAreaContainer, BorderLayout.CENTER);
gui.add(p2, BorderLayout.PAGE_END);
gui.setBorder(new EmptyBorder(4,4,4,4));
}
public Container getGui() {
return gui;
}
public static void main(String... args) {
JFrame f = new JFrame();
Exercise226 gui = new Exercise226();
f.setContentPane(gui.getGui());
f.setTitle("Numbers");
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.pack();
f.setLocationByPlatform(true);
f.setVisible(true);
}
}
This code:
Primarily provides 'white space' in the GUI using different constructors for the layouts that accept 2 int arguments for horizontal & vertical spacing.
Also adds 2 borders:
An empty border around the entire GUI to provide some spacing between it and the frame decorations.
A titled border around the text area, to make it very obvious.
Does implement a change for one unnecessary part of the original code. Instead of extending frame, it simply retains an instance of one.
Uses the JScrollPane container for the text area, as suggested by #Reimeus. It adds a nice beveled border of its own to an element that needs no scroll bars.
Creates a textAreaContainer specifically so that we can set a titled border to surround the scroll pane - without interfering with its existing border. It is possible to use a CompoundBorder for the scroll pane that consists of the existing border (scroll.getBorder()) & the titled border. However that gets complicated with buttons & other elements that might change borders on selection or action. So to set an 'outermost border' for a screen element (like the text area here) - I generally prefer to wrap the entire component in another container first.
Does not create and show the GUI on the EDT. Swing GUIs should be created and modified on the EDT. Left as an exercise for the user. See Concurrency in Swing for more details.
Old Code
The original code on this answer that provides the 'comparison GUI image' seen above. IT is closely based on the original code but with the text area wrapped in a scroll pane (and gaining a beveled border because of that) & given some text to display.
import javax.swing.*;
import java.awt.*;
public class Exercise226 extends JFrame {
private JButton jbSort;
private JButton jbReverse;
private JButton jbAdd;
private JButton jbShuffle;
private JLabel jlAddnum;
private JTextArea jTextDisplay;
private JTextField jTextAdd;
public Exercise226() {
jbSort = new JButton("Sort");
jbReverse = new JButton("Reverse");
jbShuffle = new JButton("Shuffle");
jbAdd = new JButton("Add");
jlAddnum = new JLabel("Add number here: ");
// set the size constraints using columns/rows
jTextDisplay = new JTextArea("Here I am!", 6,20);
jTextAdd = new JTextField(8);
setLayout(new BorderLayout());
JPanel p1 = new JPanel(new GridLayout(1,3));
p1.add(jlAddnum);
p1.add(jTextAdd);
p1.add(jbAdd);
JPanel p2 = new JPanel(new GridLayout(1,3));
p2.add(jbSort);
p2.add(jbReverse);
p2.add(jbShuffle);
add(p1, BorderLayout.NORTH);
add(new JScrollPane(jTextDisplay), BorderLayout.CENTER);
add(p2, BorderLayout.SOUTH);
}
public static void main(String... args) {
Exercise226 gui = new Exercise226();
gui.setTitle("Numbers");
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//gui.setSize(300, 200);
gui.pack();
//gui.setLocationRelativeTo(null);
gui.setLocationByPlatform(true);
gui.setVisible(true);
}
}