title: Why the button on the JFrame with background image cannot show properly
body: <p>i recently code a system homepage that include the background image. After i set the background, the button that i created cannot show properly. It just appear after i use the mouse and point to the buttons' location. Can someone teach me how to fix this problem? Your help are appreciated. The codes are as below:</p>
  
  <p>public class HomePage extends JFrame{</p>
  
  <pre><code>private JPanel button = new JPanel();
  private JButton time = new JButton("Bus Schedule");
  private JButton reserve = new JButton("Booking");
  private JButton info = new JButton("About Us");
  Container con = getContentPane();
  
  
  public HomePage(){
  
      setTitle("Bus Reservation System");
      setSize(650,500);
      setLocation(360,100);
      setVisible(true);
      setResizable(false);
      setDefaultCloseOperation(EXIT_ON_CLOSE);
  
      setBackground();
      setButton();
  }
  
  
  public void setBackground(){
  
      JLabel background = new JLabel(new ImageIcon("C:/User/Desktop/Assignment/bg.jpg"));
      con.add(background);
      background.setLayout(new FlowLayout());
      con.add(button);
  
  }
  
  
  public void setButton(){
  
      Font but = new Font("Serif" , Font.ITALIC , 20);
  
      info.setFont(but);
      time.setFont(but);
      reserve.setFont(but);
  
      button.add(info);
      button.add(time);
      button.add(reserve);
  
      con.add(button);
  
  }
  </code></pre>