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Thread: For some reason, I am getting a grey background rather than the 'CYAN' I have coded.

  1. #1
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    Default For some reason, I am getting a grey background rather than the 'CYAN' I have coded.

    However, it shows a CYAN border around the button on the frame. Does anyone know why?

    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
     
     
    public class Front_ChristmasCard extends JFrame implements ActionListener
    {
     
       static String Guestname;
       private boolean cardOpen=false;
       private JButton cardOpenButton = new JButton("Open Card");
     
     
        public Front_ChristmasCard()
        {
           Guestname= JOptionPane.showInputDialog("Enter your name to see your card:");
     
     
           //sets title above window
           setTitle("Marry Christmas " + Guestname);
     
           //     sets layouts, adds buttons and sets background.
           setLayout(new FlowLayout());
           add(cardOpenButton);
           getContentPane().setBackground(Color.CYAN);
     
           //adds listener
           cardOpenButton.addActionListener(this);
     
           //sets size of window
           setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
           setSize(700,900);
           setLocation(750,750);
           setVisible(true);
        }
     
     
       public void paint(Graphics g)
       {
          g.drawString("Merry Christmas " + Guestname + "",300, 800);
          g.setColor(Color.white);
          g.fillRect(130,700,460,45);
          g.setColor(Color.red);
          g.fillRect(150,655,420,45);
          g.fillRect(170,615,380,45);
          g.fillRect(190,575,340,45);
          g.fillRect(210,535,300,45);
          g.fillRect(230,495,260,45);
          g.fillRect(250,455,220,45);
          g.fillRect(270,415,180,45);
          g.fillRect(290,375,140,45);
          g.fillRect(310,335,100,45);
          g.fillRect(340,295,40,45);
          g.setColor(Color.white);
          g.fillOval(320,255,140,100);
     
     
     
       }
     
        public void actionPerformed(ActionEvent event)
        {
           if(event.getSource() == cardOpenButton)
           {
              cardOpen = true;
              Inside_ChristmasCard gui= new Inside_ChristmasCard();
     
     
     
           }
     
     
     
     
        }
     
     
       public static void main(String[] args)
       {
           Front_ChristmasCard gui=new Front_ChristmasCard();
       }//main
    }//class


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: For some reason, I am getting a grey background rather than the 'CYAN' I have coded.

    Problems I see:
    Overriding the JFrame's paint method instead of adding a JPanel and overriding its paintComponent() method.
    Assuming 750,750 is on the screen.
    Not calling super method in paint
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: For some reason, I am getting a grey background rather than the 'CYAN' I have coded.

    I am sorry, but I couldn't understand your answer. Is there any chance you could explain those points more 'amateurally'

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: For some reason, I am getting a grey background rather than the 'CYAN' I have coded.

    Define a class that extends the JPanel class.
    Override that class's paintComponent() method
    Move the code that is in your paint() method to the paintComponent() method
    Create an instance of the new class and add it to the JFrame.

    See the tutorial for custom how to do custom painting:
    Lesson: Performing Custom Painting (The Java™ Tutorials > Creating a GUI With JFC/Swing)
    If you don't understand my answer, don't ignore it, ask a question.

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