How to use

GridLayout

in

java.awt

protected JComponent makeTextPanel(String text) {
  JPanel panel = new JPanel(false);
  JLabel filler = new JLabel(text);
  filler.setHorizontalAlignment(JLabel.CENTER);
  panel.setLayout(new GridLayout(1, 1));
  panel.add(filler);
  return panel;
}

  public void removeGridComponent(Component component) {
    GridLayout l = (GridLayout) getContentPane().getLayout();
    // Remove sections if necessary
    int threshold = (l.getColumns() - 1) * (l.getRows() - 1);
    if (threshold > 0 && threshold == getContentPane().getComponentCount() - 1) {
      getContentPane().setLayout(new GridLayout(l.getColumns() - 1, l.getRows() - 1));
    }
    getContentPane().remove(component);
    validate();
  }
}

public void addGridComponent(Component component) {
  GridLayout l = (GridLayout) getContentPane().getLayout();
  // Make more sections if necessary
  int availableSections = l.getColumns() * l.getRows();
  if (availableSections == getContentPane().getComponentCount()) {
    getContentPane().setLayout(new GridLayout(l.getColumns() + 1, l.getRows() + 1));
  }
  getContentPane().add(component);
  validate();
}

final JButton b = new JButton("r" + row + ",c" + col);
b.addActionListener(new ActionListener() {
JPanel p = new JPanel(new GridLayout(N, N));
for (int i = 0; i < N * N; i++) {
  int row = i / N;
  JButton gb = createGridButton(row, col);
  list.add(gb);
  p.add(gb);
JFrame f = new JFrame("GridButton");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(createGridPanel());
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);

private void createDebug() {
  frame = new JFrame("Smack Debug Window");
    frame.addWindowListener(new WindowAdapter() {
      @Override
      public void windowClosing(WindowEvent evt) {
  JPanel informationPanel = new JPanel();
  informationPanel.setLayout(new BoxLayout(informationPanel, BoxLayout.Y_AXIS));
  JPanel versionPanel = new JPanel();
  versionPanel.setLayout(new BoxLayout(versionPanel, BoxLayout.X_AXIS));
  versionPanel.setMaximumSize(new Dimension(2000, 31));
  JPanel iqProvidersPanel = new JPanel();
  iqProvidersPanel.setLayout(new GridLayout(1, 1));
  iqProvidersPanel.setBorder(BorderFactory.createTitledBorder("Installed IQ Providers"));
  Vector<String> providers = new Vector<>();
  JPanel extensionProvidersPanel = new JPanel();
  extensionProvidersPanel.setLayout(new GridLayout(1, 1));
  extensionProvidersPanel.setBorder(BorderFactory.createTitledBorder("Installed Extension Providers"));
  providers = new Vector<>();
  frame.getContentPane().add(tabbedPane);
  frame.setSize(650, 400);

 JFrame frame = new JFrame("Colored Trails");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
JPanel firstPanel = new JPanel();
firstPanel.setLayout(new GridLayout(4, 4));
firstPanel.setMaximumSize(new Dimension(400, 400));
JButton btn;
for (int i=1; i<=4; i++) {
  for (int j=1; j<=4; j++) {
    btn = new JButton();
    btn.setPreferredSize(new Dimension(100, 100));
    firstPanel.add(btn);
JPanel secondPanel = new JPanel();
secondPanel.setLayout(new GridLayout(5, 13));
secondPanel.setMaximumSize(new Dimension(520, 200));
for (int i=1; i<=5; i++) {
  for (int j=1; j<=13; j++) {
    btn = new JButton();
    btn.setPreferredSize(new Dimension(40, 40));
    secondPanel.add(btn);
frame.setSize(520,600);

  return;
final JFrame exceptionFrame = new JFrame("Uncaught exception: " + e.getMessage());
Icon errorIcon = UIManager.getIcon("OptionPane.errorIcon");
BufferedImage errorImage = new BufferedImage(
    errorIcon.getIconWidth(), errorIcon.getIconHeight(), BufferedImage.TYPE_INT_RGB);
errorIcon.paintIcon(null, errorImage.getGraphics(), 0, 0);
exceptionFrame.setIconImage(errorImage);
exceptionFrame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
JPanel contentPanel = new JPanel(new BorderLayout(5, 5));
contentPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
contentPanel.add(new JLabel("An uncaught exception has occurred: "), BorderLayout.NORTH);
JTextArea stackTraceTextArea = new JTextArea(30, 80);
stackTraceTextArea.setEditable(false);
contentPanel.add(stackTraceScrollPane, BorderLayout.CENTER);
stackTraceTextArea.setCaretPosition(0); // Scroll to top
JPanel buttonPanel = new JPanel(new GridLayout(1, 0));
JButton closeButton = new JButton(new AbstractAction("Close") {
  @Override
  public void actionPerformed(ActionEvent e) {
buttonPanel.add(closeButton);
JButton exitApplicationButton = new JButton(new AbstractAction("Exit application") {
  @Override
  public void actionPerformed(ActionEvent e) {

jb_add.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
jb_addAndClose.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
jb_cancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
c.setLayout(new BorderLayout());
  JPanel jp = new JPanel(new BorderLayout());
    JPanel jp_west = new JPanel(new GridLayout(2, 1));
    jp_west.add(new JLabel(" Content type: "));
    jp_west.add(new JLabel(" Name: "));
    jp.add(jp_west, BorderLayout.WEST);
    JPanel jp_center = new JPanel(new GridLayout(2, 1));
    jp_center.add(jp_contentType.getComponent());
    jp_center.add(UIUtil.getFlowLayoutPanelLeftAligned(jtf_name));
  c.add(jp, BorderLayout.NORTH);
  c.add(jsp, BorderLayout.CENTER);

c.setLayout(new BorderLayout());
JPanel jp_center = new JPanel();
jp_center.setBorder(BorderFactory.createTitledBorder("Run Test"));
jp_center.setLayout(new GridLayout(3, 1));
jp_center.add(jrb_archive);
JPanel jp_center_file = new JPanel();
jtf_archive.setEditable(false);
jp_center_file.add(jtf_archive);
jb_archive_browse.setMnemonic('b');
jb_archive_browse.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
jp_center.add(jp_center_file);
jp_center.add(jrb_last);
c.add(jp_center, BorderLayout.CENTER);
JPanel jp_south = new JPanel();
jp_south.setLayout(new FlowLayout(FlowLayout.RIGHT));
jb_next.setMnemonic('n');
getRootPane().setDefaultButton(jb_next);
jb_next.addActionListener(new ActionListener() {
jp_south.add(jb_cancel);
c.add(jp_south, BorderLayout.SOUTH);

protected JDialog createDialog(Component parent) {
  Frame frame = parent instanceof Frame ? (Frame) parent
      : (Frame) SwingUtilities.getAncestorOfClass(Frame.class, parent);
  JDialog dialog = new JDialog(frame, ("Select Font"), true);
  Action okAction = new DialogOKAction(dialog);
  Action cancelAction = new DialogCancelAction(dialog);
  JButton okButton = new JButton(okAction);
  okButton.setFont(DEFAULT_FONT);
  JButton cancelButton = new JButton(cancelAction);
  cancelButton.setFont(DEFAULT_FONT);
  JPanel buttonsPanel = new JPanel();
  buttonsPanel.setLayout(new GridLayout(2, 1));
  buttonsPanel.add(okButton);
  buttonsPanel.add(cancelButton);
  buttonsPanel.setBorder(BorderFactory.createEmptyBorder(25, 0, 10, 10));
  ActionMap actionMap = buttonsPanel.getActionMap();
  actionMap.put(cancelAction.getValue(Action.DEFAULT), cancelAction);
  actionMap.put(okAction.getValue(Action.DEFAULT), okAction);
  InputMap inputMap = buttonsPanel.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
  inputMap.put(KeyStroke.getKeyStroke("ESCAPE"), cancelAction.getValue(Action.DEFAULT));
  inputMap.put(KeyStroke.getKeyStroke("ENTER"), okAction.getValue(Action.DEFAULT));
  JPanel dialogEastPanel = new JPanel();
  dialogEastPanel.setLayout(new BorderLayout());
  dialogEastPanel.add(buttonsPanel, BorderLayout.NORTH);
  dialog.getContentPane().add(this, BorderLayout.CENTER);
  dialog.getContentPane().add(dialogEastPanel, BorderLayout.EAST);
  dialog.pack();
  dialog.setLocationRelativeTo(frame);
  return dialog;
}

 JFrame frame = new JFrame("test");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JPanel panel = new JPanel(new GridLayout(4,4,4,4));

for(int i=0 ; i<16 ; i++){
  JButton btn = new JButton(String.valueOf(i));
  btn.setPreferredSize(new Dimension(40, 40));
  panel.add(btn);
}
frame.setContentPane(panel);
frame.pack();
frame.setVisible(true);

topPanel = new JPanel();         // our top component
bottomPanel = new JPanel();      // our bottom component
inputPanel = new JPanel();
textField = new JTextField();    // first the input field where the user can type his text
button = new JButton("send");    // and a button at the right, to send the text
getContentPane().setLayout(new GridLayout());  // the default GridLayout is like a grid with 1 column and 1 row,
getContentPane().add(splitPane);               // due to the GridLayout, our splitPane will now fill the whole window
inputPanel.add(button);           // and right the "send" button
pack();   // calling pack() at the end, will ensure that every layout and size we just defined gets applied before the stuff becomes visible
  @Override
  public void run(){
    new MyFrame().setVisible(true);

final JFrame frame = new JFrame("Nested Layout Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel gui = new JPanel(new BorderLayout(5,5));
gui.setBorder( new TitledBorder("BorderLayout(5,5)") );
plafComponents.add(plafChooser);
plafComponents.add(pack);
gui.add(plafComponents, BorderLayout.NORTH);
final JPanel labels = new JPanel(new GridLayout(0,2,3,3));
labels.setBorder(
  new TitledBorder("GridLayout(0,2,3,3)") );
JButton addNew = new JButton("Add Another Label");
dynamicLabels.add( addNew, BorderLayout.NORTH );
addNew.addActionListener( new ActionListener(){
gui.add( splitPane, BorderLayout.CENTER );
frame.setContentPane(gui);
frame.pack();
frame.setLocationRelativeTo(null);

public Calculator() {
   window = new JFrame("Calculator");
   window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JPanel digitsPanel = new JPanel();
   digitsPanel.setLayout(new GridLayout(4, 3));
   for (int digit = 0; digit <=9; digit++) {
     JButton button = new JButton(Integer.toString(digit));
     button.addActionListener(this);
     digitsPanel.add(button);
   }
   window.add(digitsPanel);
   window.pack();
   window.setVisible(true);
 }

final JButton openFileButton = new JButton(new FileSelectionAction());
openFileButton.setMnemonic(KeyEvent.VK_S);
openFileButton.setText("Open File");
modesLabel.setBorder(BorderFactory.createEmptyBorder(0, leftIndentation, 0, 0));
final JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(1, 2));
buttonPanel.add(openFileButton);
buttonPanel.add(reloadFileButton);

JPanel p = new JPanel(new GridLayout(2,1));
header.setPreferredSize(new Dimension(100, HEADER_HEIGHT));
p.add(makeTitledPanel("Bad: JTableHeader#setPreferredSize(...)", new JScrollPane(table1)));
p.add(makeTitledPanel("Override getPreferredSize()", scroll));
panel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
return panel;
JPanel p = new JPanel(new BorderLayout());
p.add(c);
p.setBorder(BorderFactory.createTitledBorder(title));
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new TableHeaderHeightTest().makeUI());
f.setSize(320, 320);
f.setLocationRelativeTo(null);
f.setVisible(true);

JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel();
p.add(f);
frame.add(p);
frame.pack();
frame.setVisible(true);
autoSuggestionPopUpWindow.setOpacity(opacity);
suggestionsPanel = new JPanel();
suggestionsPanel.setLayout(new GridLayout(0, 1));
suggestionsPanel.setBackground(popUpBackground);
textField.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, true), "Down released");
textField.getActionMap().put("Down released", new AbstractAction() {
  @Override
  public void actionPerformed(ActionEvent ae) {//focuses the first label on popwindow

JFrame frame = new JFrame("Layout Example");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
JPanel contentPane = new JPanel(
        new GridLayout(0, 1, hGap, vGap));
contentPane.setBorder(
  BorderFactory.createEmptyBorder(hGap, vGap, hGap, vGap));
borderPanel = new JPanel(new BorderLayout(hGap, vGap));
borderPanel.setBorder(
  BorderFactory.createTitledBorder("BorderLayout"));
borderPanel.setOpaque(true);
  buttons[i] = new JButton(borderConstraints[i]);
  borderPanel.add(buttons[i], borderConstraints[i]);
contentPane.add(borderPanel);
flowPanel = new JPanel(new FlowLayout(
  buttons[i] = new JButton(Integer.toString(i));
  flowPanel.add(buttons[i]);
gridPanel = new JPanel(new GridLayout(2, 2, hGap, vGap));
  buttons[i] = new JButton(Integer.toString(i));

final JFrame frame = new JFrame("Text HIGHLIGHT");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
JPanel contentPane = new JPanel();
contentPane.setBorder(BorderFactory.createTitledBorder(
    BorderFactory.createEmptyBorder(5, 5, 5, 5), "Highlighter JTextArea"));
contentPane.add(scrollPane);
JButton remHighButton = new JButton("REMOVE HIGHLIGHT");
remHighButton.addActionListener(new ActionListener()
JButton button = new JButton("HIGHLIGHT TEXT");
button.addActionListener(new ActionListener()
frame.add(remHighButton, BorderLayout.PAGE_START);
frame.add(contentPane, BorderLayout.CENTER);
frame.add(button, BorderLayout.PAGE_END);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder(
        BorderFactory.createLineBorder(Color.DARK_GRAY, 2), "COLOUR SELECTION"));
panel.setLayout(new GridLayout(0, 2, 5, 5));

private static final Dimension LAYERED_PANE_SIZE = new Dimension(WIDTH, HEIGHT);
private static final Dimension LABEL_SIZE = new Dimension(60, 40);
private GridLayout gridlayout = new GridLayout(GRID_ROWS, GRID_COLS, GAP, GAP);
private JPanel backingPanel = new JPanel(gridlayout);
private JPanel[][] panelGrid = new JPanel[GRID_ROWS][GRID_COLS];
private JLabel redLabel = new JLabel("Red", SwingConstants.CENTER);
  redLabel.setOpaque(true);
  redLabel.setBackground(Color.red.brighter().brighter());
  redLabel.setPreferredSize(LABEL_SIZE);
  panelGrid[4][3].add(redLabel);
  blueLabel.setOpaque(true);
  blueLabel.setBackground(Color.blue.brighter().brighter());
  blueLabel.setPreferredSize(LABEL_SIZE);
  panelGrid[1][1].add(blueLabel);
  backingPanel.setBorder(BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
  JFrame frame = new JFrame("DragLabelOnLayeredPane");
  frame.getContentPane().add(new DragLabelOnLayeredPane());
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.pack();
  frame.setLocationRelativeTo(null);
  frame.setVisible(true);