Simplest way to set image as JPanel background

Question

How would I add the backgroung image to my JPanel without creating a new class or method  but simply by inserting it along with the rest of the JPanel s attributes    I am trying to set a JPanel s background using an image  however  every example I find seems to suggest extending the panel with its own class   I have been looking for a way to simply add the image without creating a whole new class and within the same method  trying to keep things organized and simple    Here is an example of the method that sets my JPanel   public static JPanel drawGamePanel          Create game panel and attributes     JPanel gamePanel   new JPanel        Image background   Toolkit getDefaultToolkit   createImage  Background png        gamePanel drawImage background  0  0  null         Set Return     return gamePanel

User · Answer

As I know the way you can do it is to override paintComponent method that demands to inherit JPanel

 @Override
protected void paintComponent(Graphics g) {
    super.paintComponent(g); // paint the background image and scale it to fill the entire space
    g.drawImage(/*....*/);
}

The other way (a bit complicated) to create second custom JPanel and put is as background for your main

ImagePanel

public class ImagePanel extends JPanel
{
private static final long serialVersionUID = 1L;
private Image image = null;
private int iWidth2;
private int iHeight2;

public ImagePanel(Image image)
{
    this.image = image;
    this.iWidth2 = image.getWidth(this)/2;
    this.iHeight2 = image.getHeight(this)/2;
}


public void paintComponent(Graphics g)
{
    super.paintComponent(g);
    if (image != null)
    {
        int x = this.getParent().getWidth()/2 - iWidth2;
        int y = this.getParent().getHeight()/2 - iHeight2;
        g.drawImage(image,x,y,this);
    }
}
}

EmptyPanel

public class EmptyPanel extends JPanel{

private static final long serialVersionUID = 1L;

public EmptyPanel() {
    super();
    init();
}

@Override
public boolean isOptimizedDrawingEnabled() {
    return false;
}


public void init(){

    LayoutManager overlay = new OverlayLayout(this);
    this.setLayout(overlay);

    ImagePanel iPanel = new ImagePanel(new IconToImage(IconFactory.BG_CENTER).getImage());
    iPanel.setLayout(new BorderLayout());   
    this.add(iPanel);
    iPanel.setOpaque(false);                
}
}

IconToImage

public class IconToImage {

Icon icon;
Image image;


public IconToImage(Icon icon) {
    this.icon = icon;
    image = iconToImage();
}

public Image iconToImage() { 
    if (icon instanceof ImageIcon) { 
        return ((ImageIcon)icon).getImage(); 
    } else { 
        int w = icon.getIconWidth(); 
        int h = icon.getIconHeight(); 
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); 
        GraphicsDevice gd = ge.getDefaultScreenDevice(); 
        GraphicsConfiguration gc = gd.getDefaultConfiguration(); 
        BufferedImage image = gc.createCompatibleImage(w, h); 
        Graphics2D g = image.createGraphics(); 
        icon.paintIcon(null, g, 0, 0); 
        g.dispose(); 
        return image; 
    } 
}


/**
 * @return the image
 */
public Image getImage() {
    return image;
}
}

User · Answer

Simplest way to set image as JPanel background   Don t use a JPanel  Just use a JLabel with an Icon then you don t need custom code   See Background Panel for more information as well as a solution that will paint the image on a JPanel with 3 different painting options    scaled tiled actual

User · Answer

Draw the image on the background of a JPanel that is added to the frame   Use a layout manager to normally add your buttons and other components to the panel   If you add other child panels  perhaps you want to set child setOpaque false    import javax imageio ImageIO  import javax swing    import java awt    import java io IOException  import java net URL   public class BackgroundImageApp       private JFrame frame       private BackgroundImageApp create             frame   createFrame            frame getContentPane   add createContent              return this             private JFrame createFrame             JFrame frame   new JFrame getClass   getName             frame setDefaultCloseOperation WindowConstants EXIT ON CLOSE            return frame             private void show             frame pack            frame setLocationRelativeTo null           frame setVisible true              private Component createContent             final Image image   requestImage             JPanel panel   new JPanel                  Override             protected void paintComponent Graphics g                    super paintComponent g                   g drawImage image  0  0  null                                     panel setLayout new BoxLayout panel  BoxLayout Y AXIS            for  String label   new String    One    Dois    Drei    Quatro    Peace                  JButton button   new JButton label               button setAlignmentX Component CENTER ALIGNMENT               panel add Box createRigidArea new Dimension 15  15                 panel add button                      panel setPreferredSize new Dimension 500  500             return panel             private Image requestImage             Image image   null           try               image   ImageIO read new URL  http   www johnlennon com wp-content themes jl images home-gallery 2 jpg               catch  IOException e                e printStackTrace                       return image             public static void main String   args            SwingUtilities invokeLater new Runnable                  Override             public void run                     new BackgroundImageApp   create   show

User · Answer

I am trying to set a JPanel s background using an image  however  every example I find seems to suggest extending the panel with its own class   yes you will have to extend JPanel and override the paintcomponent Graphics g  function to do so     Override   protected void paintComponent Graphics g         super paintComponent g           g drawImage bgImage  0  0  null          I have been looking for a way to simply add the image without creating a whole new class and within the same method  trying to keep things organized and simple     You can use other component which allows to add image as icon directly e g  JLabel if you want   ImageIcon icon   new ImageIcon imgURL    JLabel thumb   new JLabel    thumb setIcon icon     But again in the bracket trying to keep things organized and simple    what makes you to think that just creating a new class will lead you to a messy world

User · Answer

public demo1         initComponents        ImageIcon img   new ImageIcon  C   Users  AMIT TIWARI  Documents  NetBeansProjects  try  src  com  dd jpeg      full path of image     Image img2   img getImage   getScaledInstance mylabel getWidth    mylabel getHeight   1       ImageIcon img3   new ImageIcon img2       mylabel setIcon img3

User · Answer

class Logo extends JPanel       Logo                   code            Override     public void paintComponent Graphics g                 super paintComponent g           ImageIcon img   new ImageIcon  logo jpg            g drawImage img getImage    0  0  this getWidth    this getHeight    null

[java] Simplest way to set image as JPanel background

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