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+import java.awt.Font;%0Aimport java.awt.event.ActionEvent;%0Aimport java.awt.event.ActionListener;%0Aimport javax.swing.JButton;%0Aimport javax.swing.JFrame;%0Aimport javax.swing.JLabel;%0Aimport javax.swing.JPanel;%0Aclass LblDisplay extends JLabel %7B%0A    Mediator med;%0A    LblDisplay(Mediator m) %7B%0A        super(%22Just start...%22);%0A        med = m;%0A        med.registerDisplay(this);%0A        setFont(new Font(%22Arial%22, Font.BOLD, 24));%0A    %7D%0A%7D%0A

Create LblDisplay.java