make the last button align horizontally with other components

[Raymond Poon]

The right hand side of the last button of this program does not align horizontally with other components (e.g. JTextField).
How to make the right hand side of the last button ("b4") align horizontally with other components ?

import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.TableColumn;

public class SwingPanel {
	public static void addComponentsToPane(Container pane) {
		pane.setLayout(new GridBagLayout());
		pane.setPreferredSize(new Dimension(1100, 600));
		GridBagConstraints c = new GridBagConstraints();

		Box testBox = Box.createHorizontalBox();

		JLabel testLabel = new JLabel("test Identifier: ");
		testBox.add(testLabel);

		JTextField testID = new JTextField("TT123456789012");
		c.gridwidth = 1;
		c.gridx = 9;
		c.gridy = 0;
		c.anchor = GridBagConstraints.FIRST_LINE_END;
		testID.setEditable(false);
		testBox.add(testID);
		pane.add(testBox, c);

		Object rowData[][] = {
				{ "100000000", "Mouse, Mickey",
						"123 NOWHERE STREET, NEW YORK, NY, 12345",
						"UNITED STATES", "50%" },
				{ "123456789", "Peter, Pan",
						"12 Main Street, Waterloo, On, S4N 4G6", "CANADA",
						"50%" } };
		Object columnNames[] = { "ID number", "Name", "Address", "Country",
				"Role" };
		JTable table = new JTable(rowData, columnNames);
		table.setShowGrid(false);
		table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
		TableColumn column = null;
		int width[] = { 100, 150, 300, 150, 50 };
		for (int i = 0; i < 5; i++) {
			column = table.getColumnModel().getColumn(i);
			column.setPreferredWidth(width[i]);
		}

		c.gridx = 0;
		c.gridy = 4;
		c.insets.top = 10;
		c.gridwidth = 10;
		c.fill = GridBagConstraints.HORIZONTAL;
		c.weightx = 0.0;
		JScrollPane scrollPane = new JScrollPane(table);
		scrollPane.setPreferredSize(new Dimension(750, 300));
		scrollPane
				.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		pane.add(scrollPane, c);

		c.gridx = 0;
		c.gridy = 8;
		c.gridwidth = 1;
		c.fill = GridBagConstraints.NONE;
		c.anchor = GridBagConstraints.LAST_LINE_START;
		JButton b1Button = new JButton("b1"), b2Button = new JButton("b2"), b3Button = new JButton(
				"b3"), b3xButton = new JButton("b3 x"), b4Button = new JButton(
				"b4");

		Box buttonBox = Box.createHorizontalBox();
		buttonBox.add(b1Button);
		buttonBox.add(Box.createHorizontalStrut(160));
		pane.add(buttonBox, c);

		c.gridx = 6;
		pane.add(b2Button, c);
		c.gridx = GridBagConstraints.RELATIVE;
		pane.add(b3Button, c);
		pane.add(b3xButton, c);
		pane.add(b4Button, c);
	}

	/**
	 * Create the GUI and show it. For thread safety, this method should be
	 * invoked from the event-dispatching thread.
	 */
	private static void createAndShowGUI() {
		// Create and set up the window.
		JFrame frame = new JFrame("SwingPanel");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Set up the content pane.
		addComponentsToPane(frame.getContentPane());

		// Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		// Schedule a job for the event-dispatching thread:
		// creating and showing this application's GUI.
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}

[Rob Camick]

Check out the solution in this posting for creating the button panel:

http://www.coderanch.com/t/528119/GUI/java/Position-buttons-GridBagConstraints-Swing

[vibhas bhingarde]

can post image of your existing gui

[Rob Camick]

can post image of your existing gui

Run the posted code and you can see the exact behaviour.

[Raymond Poon]

Another question is:
Executing setMinimumSize do not set the panel to a minimum size - the panel can be reduced to a very small size.

		// ...
		pane.setPreferredSize(new Dimension(1100, 600));
		pane.setMinimumSize(new Dimension(1100, 600));
		// ...

[Raymond Poon]

Rob Camick wrote:Check out the solution in this posting for creating the button panel:

http://www.coderanch.com/t/528119/GUI/java/Position-buttons-GridBagConstraints-Swing

Using a horizontal BoxLayout solves the problem.
Thanks!