Java SE (Java Platform, Standard Edition)

Hi,

I try to get my screen build up like I want to have it (therefore I choose what I use now). I noticed odd behaviour when programming my timeArea (see code, at about ODD BEHAVIOUR).

When I set the preferred size of the text area to width/8, the code runs as expected. When I set the preferred size of the text area to width/4, the text area is horizontally squashed together. Can someone explain to me why this happens?

import java.awt.*;

import javax.swing.*;


public class GridBagLayoutProblem {
	
	public GridBagLayoutProblem () {
		JFrame frame = new JFrame ("GridBagLayoutProblem");
		frame.setBackground(Color.WHITE);
		Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
		int width = dimension.width;
		int height = dimension.height - 250;
		frame.setBounds (0, 0, width, height);
		
		Container pane = frame.getContentPane();
		frame.setLayout(new BoxLayout(pane, BoxLayout.Y_AXIS));
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		JPanel panel = new JPanel ();
		panel.setLayout(new GridBagLayout());
		panel.setBorder(BorderFactory.createRaisedBevelBorder());
		
		GridBagConstraints constraints = new GridBagConstraints();
		constraints.fill = GridBagConstraints.HORIZONTAL; 
		constraints.gridx = 0;
		constraints.gridy = 0;
		constraints.gridheight = 1;
		constraints.gridwidth = 2; 
		JLabel name = new JLabel("Name: Jane Doe");
		name.setPreferredSize(new Dimension (width/2, height/20));
		name.setAlignmentX(SwingConstants.LEFT);
		name.setBackground(Color.WHITE);
		name.setBorder(BorderFactory.createRaisedBevelBorder());
		panel.add(name, constraints);
		
		constraints.fill = GridBagConstraints.HORIZONTAL; 
		constraints.gridx = 3;
		constraints.gridy = 0;
		constraints.gridwidth = 1; 
		constraints.gridheight = 1;
		JTextArea timeArea = new JTextArea ("10:09:30");
		timeArea.setAlignmentX(Component.CENTER_ALIGNMENT);

                // ODD BEHAVIOUR?
		// timeArea.setPreferredSize(new Dimension ((width/4), (height/20)));
		timeArea.setPreferredSize(new Dimension ((width/8), (height/20)));

		timeArea.setBackground(Color.WHITE);
		timeArea.setEditable(false); 
		timeArea.setLineWrap(true);
		timeArea.setWrapStyleWord(true);
		timeArea.setBorder(BorderFactory.createRaisedBevelBorder());
		panel.add (timeArea, constraints);
		
		// CSD engineer following the problem
		constraints.gridx = 4;
		constraints.gridy = 0;
		constraints.gridwidth = constraints.REMAINDER; 
		constraints.gridheight = 1;
		JButton changeName = new JButton ("Change name");
		JPanel namePanel = new JPanel();
		namePanel.setBorder(BorderFactory.createRaisedBevelBorder());
		namePanel.setPreferredSize(new Dimension ((width/4), height/20));
		namePanel.add(changeName);
		panel.add(namePanel, constraints);
		
		frame.add(panel);
		// frame.pack();
		frame.setVisible(true);
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		GridBagLayoutProblem myProblem = new GridBagLayoutProblem();
	}

}

TIA,
Abel