JFrame background image

Question

I am creating a GUI  albeit a simple one  and I want to have a background image  2048 X 2048  fill up the whole window and a square to the left top corner where the occasional 64 X 64 image can be loaded  Thanks in advance to anyone who helps out    Edit  I already know how to make the JFrame a set size  its the image loading I need help with

User · Accepted Answer

This is a simple example for adding the background image in a JFrame   import javax swing    import java awt    import java awt event    class BackgroundImageJFrame extends JFrame       JButton b1      JLabel l1       public BackgroundImageJFrame                 setTitle  Background Color for JFrame            setSize 400 400           setLocationRelativeTo null           setDefaultCloseOperation EXIT ON CLOSE           setVisible true                       One way         -----------------         setLayout new BorderLayout             JLabel background new JLabel new ImageIcon  C   Users  Computer  Downloads  colorful design png             add background           background setLayout new FlowLayout             l1 new JLabel  Here is a button            b1 new JButton  I am a button            background add l1           background add b1                          Another way         setLayout new BorderLayout             setContentPane new JLabel new ImageIcon  C   Users  Computer  Downloads  colorful design png              setLayout new FlowLayout             l1 new JLabel  Here is a button            b1 new JButton  I am a button            add l1           add b1              Just for refresh    Not optional          setSize 399 399           setSize 400 400              public static void main String args                  new BackgroundImageJFrame                Click here for more info

User · Answer

You can do    setContentPane new JLabel new ImageIcon  resources taverna jpg        At first line of the Jframe class constructor  that works fine for me

User · Answer

The best way to load an image is through the ImageIO API  BufferedImage img   ImageIO read new File   path to some image       There are a number of ways you can render an image to the screen   You could use a JLabel   This is the simplest method if you don t want to modify the image in anyway     JLabel background   new JLabel new ImageIcon img      Then simply add it to your window as you see fit   If you need to add components to it  then you can simply set the label s layout manager to whatever you need and add your components   If  however  you need something more sophisticated  need to change the image somehow or want to apply additional effects  you may need to use custom painting   First cavert  Don t ever paint directly to a top level container  like JFrame    Top level containers aren t double buffered  so you may end up with some flashing between repaints  other objects live on the window  so changing it s paint process is troublesome and can cause other issues and frames have borders which are rendered inside the viewable area of the window     Instead  create a custom component  extending from something like JPanel   Override it s paintComponent method and render your output to it  for example     protected void paintComponent Graphics g        super paintComponent g       g drawImage img  0  0  this       Take a look at Performing Custom Painting and 2D Graphics for more details

User · Answer

I used a very similar method to  bott  but I modified it a little bit to make there be no need to resize the image   BufferedImage img   null  try       img   ImageIO read new File  image jpg       catch  IOException e        e printStackTrace      Image dimg   img getScaledInstance 800  508  Image SCALE SMOOTH   ImageIcon imageIcon   new ImageIcon dimg   setContentPane new JLabel imageIcon      Works every time  You can also get the width and height of the jFrame and use that in place of the 800 and 508 respectively

[java] JFrame background image

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