ActionEvent GetSource Example

public class PigPanel extends JPanel
{
    private JButton rollButton, passButton;

    public PigPanel()
    {
        rollButton = new JButton("Roll");
        rollButton.setPreferredSize(new Dimension(550, 60));
        rollButton.addActionListener(new ButtonListener());
        add(rollButton);

        passButton = new JButton("Pass it!");
        passButton.setPreferredSize(new Dimension(150, 50));
        passButton.addActionListener(new ButtonListener());
        add(rollButton);
    }

    private class ButtonListener implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
            if (event.getSource() == rollButton)
            {
                // do one thing
            }
            else if (event.getSource() == passButton)
            {
                // do another thing
            }
        }
    }
}