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copied!<p>Good question. It took me little to crack it, but I got it. Normally, I would have put setions 1-7 in a top panel, and sections 8-9 in a bottom panel, but I liked the challange of 1 panel with GBL. [bored]</p> <p>The problem is that section 4 (column indexes 4 and 5) is not well-defined for GBL, so section 8 doesn't know how far out to go to cover it's fifth column (index 4) so it then just stops after column index 3.</p> <p>So, I added 2 zero-height spacers in the columns that make up section 4 and it worked. Comment out the 2 lines marked SPACERS to see what I mean:</p> <p><strong>EDIT</strong>: added fix suggested by @SheridanVespo</p> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; public class GridBagDemo2 implements Runnable { private Color[] colors = {Color.BLACK, Color.BLUE, Color.CYAN, Color.GRAY, Color.GREEN, Color.MAGENTA, Color.ORANGE, Color.PINK, Color.RED, Color.YELLOW}; private JPanel panel; private GridBagConstraints gbc; public static void main(String[] args) { SwingUtilities.invokeLater(new GridBagDemo2()); } public void run() { panel = new JPanel(new GridBagLayout()); gbc = new GridBagConstraints(); add(0,0, 2,2, "1"); add(2,0, 2,1, "2"); add(2,1, 2,1, "3"); add(4,0, 2,2, "4"); add(6,0, 2,1, "5"); add(6,1, 2,1, "6"); add(8,0, 2,2, "7"); add(0,2, 5,1, "8"); add(5,2, 5,1, "9"); // SPACERS: define the 2 columns that is section "4" add(4,3, 1,1, ""); add(5,3, 1,1, ""); JFrame frame = new JFrame("Grig Bag"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(panel); frame.pack(); frame.setVisible(true); } private void add(int x, int y, int colspan, int rowspan, String name) { gbc.gridx = x; gbc.gridy = y; gbc.gridwidth = colspan; gbc.gridheight = rowspan; gbc.weightx = .1; gbc.weighty = .1; gbc.anchor = GridBagConstraints.CENTER; gbc.fill = GridBagConstraints.BOTH; // using another panel for illustrative purposes only JPanel p = new JPanel(); if (!name.equals("")) { gbc.weightx = 1; // @SheridanVespo fix int index = Integer.parseInt(name); JLabel label = new JLabel("Panel " + name); p.add(label); p.setBackground(colors[index]); panel.add(p, gbc); } else { gbc.weightx = 0.5; // @SheridanVespo fix gbc.weighty = 0; // don't allow the spacer to grow gbc.fill = GridBagConstraints.NONE; panel.add(Box.createHorizontalGlue(), gbc); } } } </code></pre>

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