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    <p>Here is your code in a form that works. To make it work, you need to to the following things:</p> <ol> <li>all buttons need the same amount of weightx, to get the space evenly distributed between them</li> <li>the heading needs some weightx to get all the of its row</li> <li>use fill=BOTH to make all components fill the space they get</li> <li>use gridwidth to make the heading use three columns while the buttons only use one</li> <li>use the horizontal alignment of JLabel to make the heading centered within its space</li> </ol> <hr> <pre><code>public void initialize() { JButton[] moveChoices = new JButton[3]; JPanel buttonsPanel = new JPanel(); buttonsPanel.setBackground(Color.green); buttonsPanel.setLayout(new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); JLabel welcome = new JLabel(); c.fill=GridBagConstraints.BOTH; c.anchor=GridBagConstraints.CENTER; welcome.setText("Welcome to rock paper scissors! Please enter your move."); welcome.setHorizontalAlignment(SwingConstants.CENTER); c.weightx=1; c.gridy = 0; c.gridx = 0; c.insets = new Insets(10, 0, 0, 0); c.gridwidth=moveChoices.length; c.gridheight=1; buttonsPanel.add(welcome,c); c.insets=new Insets(0,0,0,0); c.gridwidth=1; for(int i = 0; i &lt; moveChoices.length; i++) { moveChoices[i] = new JButton(); c.gridx = i; c.gridy = 1; c.weightx=0.5; c.weighty=1; moveChoices[i].addActionListener(this); buttonsPanel.add(moveChoices[i], c); } moveChoices[0].setText("Rock"); moveChoices[1].setText("Paper"); moveChoices[2].setText("Scissors"); this.add(buttonsPanel); } </code></pre>
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    1. POCenter Components in JPanel with GridBagLayout
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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