Resizing Image to fit jLabel Trouble

Question

I want to re-size my ImageIcon to fit my jLabel. Using the answer from this post Scale the ImageIcon automatically to label size I am using

public jfrmHome() {
    initComponents();
    this.setLocationRelativeTo(null);
    ImageIcon iconimage;
    iconimage = new ImageIcon(getClass().getResource("/org/me/musiconweb/resources/Music-icon.png"));
    BufferedImage bi = new BufferedImage(iconimage.getIconWidth(), iconimage.getIconHeight(), BufferedImage.TYPE_INT_RGB);
    Graphics g = bi.createGraphics();
    iconimage.paintIcon(null, g, 0,0);
    g.dispose();
    BufferedImage resizedimage=resize(bi,jlblPicture.getWidth(), jlblPicture.getHeight());
    ImageIcon resizedicon=new ImageIcon(resizedimage);
    jlblPicture.setIcon(resizedicon);
}

This re-sizes the Image but i have a little problem. The background of the image becomes black instead of white that it was

This

original image

turns to

error image

Please what am i doing wrong?

First, change `BufferedImage.TYPE_INT_RGB` to `BufferedImage.TYPE_INT_ARGB`. For better help sooner, post an [SSCCE](http://sscce.org/). — Andrew Thompson, Oct 05 '13 at 16:08
@AndrewThompson How am i to post and SSCCE. I added only the problems that i had. — , Oct 05 '13 at 16:09
@AndrewThompson Wow thanks it worked. Could you please add it as answer so that i can mark it? — , Oct 05 '13 at 16:11
*"How am i to post and SSCCE."* That question suggests to me that you never followed the link and read what it had to say. Please do that now. — Andrew Thompson, Oct 05 '13 at 16:14

score 3 · Accepted Answer · answered Oct 05 '13 at 16:18

That image has transparency. So change BufferedImage.TYPE_INT_RGB to BufferedImage.TYPE_INT_ARGB

It is not obvious at SO on a white BG, but try this SSCCE & it becomes more clear..

import java.net.URL;
import javax.swing.*;

class ShowImage {

    public static void main(String[] args) throws Exception {
        final URL url = new URL("https://i.stack.imgur.com/1yeUy.png");
        Runnable r = new Runnable() {
            @Override
            public void run() {
                JLabel l = new JLabel(new ImageIcon(url));

                JOptionPane.showMessageDialog(null, l);
            }
        };
        // Swing GUIs should be created and updated on the EDT
        // http://docs.oracle.com/javase/tutorial/uiswing/concurrency
        SwingUtilities.invokeLater(r);
    }
}

enter image description here

score 0 · Answer 2 · answered Oct 05 '13 at 16:12

0

Your image has a transparent background. Therefore it shows as black when drawn on a newly created opaque image. Use

g.setColor(Color.WHITE);
g.fillRect(0, 0, jlblPicture.getWidth(), jlblPicture.getHeight());

if you want a white background. For transparent background, draw on TYPE_INT_ARGB image instead.

answered Oct 05 '13 at 16:12

kiheru

6,588
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1

@PreciousTijesunimi Curiously enough, it does work for me. Anyway, the important thing is that a working solution was found. – kiheru Oct 05 '13 at 16:30
Thanks maybe it was ide problem. I use netbeans – Oct 05 '13 at 16:38

score 0 · Answer 3 · answered Jun 25 '17 at 18:59

Try out these codes

ImageIcon icon1 = new 
ImageIcon(getClass().getResource("\\image\\"+f1.getName()));  
BufferedImage bi = new 
BufferedImage(icon1.getIconWidth(),icon1.getIconHeight()
,   BufferedImage.TYPE_INT_RGB);
Graphics g = bi.createGraphics();
icon1.paintIcon(null, g, 0,0);
g.dispose();`
        //image resizing code...............>
ImageIcon resizedicon=new ImageIcon(bi.getScaledInstance(imglbl.getWidth(), 
imglbl.getHeight(),1 ));
imglbl.setBackground(new java.awt.Color(255, 255, 255));
imglbl.setIcon(resizedicon);

Resizing Image to fit jLabel Trouble

3 Answers3