Как изменить фон окна java

asked Jul 4, 2009 at 4:26

Retrieve the content pane for the frame and use the setBackground() method inherited from Component to change the color.

Example:

myJFrame.getContentPane().setBackground( desiredColor );

answered Jul 4, 2009 at 4:30

To set the background color for JFrame:

getContentPane().setBackground(Color.YELLOW);  //Whatever color

answered Jul 4, 2009 at 4:33

This is the simplest and the correct method. All you have to do is to add this code after initComponents();

getContentPane().setBackground(new java.awt.Color(204, 166, 166));

That is an example RGB color, you can replace that with your desired color. If you dont know the codes of RGB colors, please search on internet… there are a lot of sites that provide custom colors like this.

answered Jul 21, 2017 at 22:49

Hello There I did have the same problem and after many attempts I found that the problem is that you need a Graphics Object to be able to draw, paint(setBackgroundColor).

My code usually goes like this:

import javax.swing.*;
import java.awt.*;


public class DrawGraphics extends JFrame{

    public DrawGraphics(String title) throws HeadlessException {
      super(title);
      InitialElements();
    }

    private void InitialElements(){
      setSize(300, 250);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setVisible(true);
      // This one does not work
      // getContentPane().setBackground(new Color(70, 80, 70));

    }

    public void paint(Graphics draw){
      //Here you can perform any drawing like an oval...
      draw.fillOval(40, 40, 60, 50);

      getContentPane().setBackground(new Color(70,80,70));
    }
}

The missing part on almost all other answers is where to place the code.
Then now you know it goes in paint(Graphics G)

answered Aug 15, 2015 at 2:20

You can use a container like so:

Container c = JFrame.getContentPane();
c.setBackground(Color.red); 

You must of course import java.awt.Color for the red color constant.

you can override the paint method of JFrame and then fill that by your favorite color like this:

@Override
public void paint(Graphics g) {
    g.setColor(Color.red);
    g.fillRect(0, 0, this.getWidth(), this.getHeight());
}

answered Mar 8, 2015 at 5:48

I had trouble with changing the JFrame background as well and the above responses did not solve it entirely. I am using Eclipse. Adding a layout fixed the issue.

public class SampleProgram extends JFrame {
    public SampleProgram() {
        setSize(400,400);
        setTitle("Sample");
        getContentPane().setLayout(new FlowLayout());//specify a layout manager
        getContentPane().setBackground(Color.red);
        setVisible(true);
}

answered Jul 28, 2020 at 19:42

You can use this code block for JFrame background color.

    JFrame frame = new JFrame("Frame BG color");
    frame.setLayout(null);
    
    frame.setSize(1000, 650);
    frame.getContentPane().setBackground(new Color(5, 65, 90));
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setResizable(false);
    frame.setVisible(true);

answered Jan 9, 2021 at 5:36

I am trying to make a planner and want to change the background of my JFrame.
I have already tried frame.getContentPane().setBackground(Color.); but that doesn’t seem to work.

Here is the code for the frame portion

`public Planner(){
    frame = new JFrame();
    main = new JPanel();
    menu = new Menu(this);
    frame.setPreferredSize(preferredSize);
    frame.add(main);
    frame.setJMenuBar(menu);
    frame.pack();
    frame.setVisible(true);
    frame.setLocationRelativeTo(null);
    frame.setIconImage(Toolkit.getDefaultToolkit().getImage("Icon.png"));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setTitle("Myva");

    JLabel loading = new JLabel();
    JOptionPane pane = new JOptionPane();
    pane.showMessageDialog( null, "Hi. ");
    name = pane.showInputDialog("What is your name:");

}

Thanks in advance

asked Aug 23, 2015 at 2:16

To change the color of your JFrame, use the following code:

frame.setBackground(Color.BLUE);

(Color doesn’t have to be blue, I just used it as an example)

answered Aug 23, 2015 at 2:19

I am trying to make a planner and want to change the background of my JFrame.
I have already tried frame.getContentPane().setBackground(Color.); but that doesn’t seem to work.

Here is the code for the frame portion

`public Planner(){
    frame = new JFrame();
    main = new JPanel();
    menu = new Menu(this);
    frame.setPreferredSize(preferredSize);
    frame.add(main);
    frame.setJMenuBar(menu);
    frame.pack();
    frame.setVisible(true);
    frame.setLocationRelativeTo(null);
    frame.setIconImage(Toolkit.getDefaultToolkit().getImage("Icon.png"));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setTitle("Myva");

    JLabel loading = new JLabel();
    JOptionPane pane = new JOptionPane();
    pane.showMessageDialog( null, "Hi. ");
    name = pane.showInputDialog("What is your name:");

}

Thanks in advance

asked Aug 23, 2015 at 2:16

To change the color of your JFrame, use the following code:

frame.setBackground(Color.BLUE);

(Color doesn’t have to be blue, I just used it as an example)

answered Aug 23, 2015 at 2:19