change contents in one panel from another panel within the same frame

I have a project where you can click on a button in one panel to change the contents of another panel.   Here's a really really brief layout of what I have:

Main Frame
                Left Panel
                Center Panel
                Right Panel


Here's what's going on:   I open the program, Main frame is instantiated, along with that it also instantiantes all 3 panels.    Now once the program is completely loaded it sits and waits for a user response.    The center panel has a button which will be accompanied by an Id in the ActionListener class.  When the user clicks this button I want the contents of the Right Panel to be changed.   Everything in the Right Panel has a 'Static' state, meaning buttons, labels, textfields are all static.    

I was told that you can call that right panel from the center panel and just change the contents without having to restart the whole main frame.   Is this possible?   I was told to use the 'static' state within the right panel for the objects.     Here's some brief code:

//from the center panel

public class CenterPanel extends JPanel{
    JButton viewButton;
    JPanel viewPanel;
    JComboBox userCombo;

    Dimension buttonSize = new Dimension(60, 20);
    Dimension panelSize = new Dimension(410, 35);

    public CenterPanel(){
        viewButton = new JButton("View");
        viewButton.setPreferredSize(buttonSize);
        viewButton.addActionListener(new viewAction("4"));
        viewPanel = new JPanel();
        viewPanel.setPreferredSize(panelSize);
        viewPanel.setMinimumSize(panelSize);
        viewPanel.setBorder(timeBorder);

        //Constructs panel
        JPanel centerPanel = new JPanel();
        viewPanel.setLayout(new FlowLayout());
        viewPanel.add(viewButton);
        centerPanel.add(viewPanel);
        }

        add(centerPanel);
    }

    public class viewAction implements ActionListener{
        String slotId;
        public viewAction(String id){
            slotId = id;
        }
        public void actionPerformed(ActionEvent e) {
            DetailPanel detail = new DetailPanel();
            detail.tryMe(slotId);
        }

    }
}

//and here's from the right panel:

public class RightPanel extends JPanel {
    public static JLabel userTimeLabel = new JLabel();
    Dimension textBoxSize = new Dimension(140, 15);

    public RightPanel(){
        userTimeLabel.setPreferredSize(textBoxSize);
        userTimeLabel.setAlignmentX(JLabel.LEFT_ALIGNMENT);
        userTimeLabel.setText("");
        userTimeLabel.setFont(boxFont);

        //Constructs panel
        JPanel topPanel = new JPanel();
        topPanel.setLayout(new FlowLayout());
        topPanel.add(userTimeLabel);
        add(topPanel);

        add(topPanel);
    }

    public RightPanel(String slotId){
        userTimeLabel.setPreferredSize(textBoxSize);
        userTimeLabel.setAlignmentX(JLabel.LEFT_ALIGNMENT);
        userTimeLabel.setText(slotId);
        userTimeLabel.setFont(boxFont);

        //Constructs panel
        JPanel topPanel = new JPanel();
        topPanel.setLayout(new FlowLayout());
        topPanel.add(userTimeLabel);
        add(topPanel);
    }
}

I basically want to call the right panel from the center panel and change 'userTimeLabel.setText()'    Any suggestions???????