swing JOptionPane Icons not showing correctly

Reda Mokrane

When showing JOptionPane the icons are not showing correctly.

I'm using windows 10 and java version 1.8.0_251

any idea?

thank you

Christian Osvaldo González

what is the error?

try this, maybe can help you

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

public class TestImageCenter {

    public static void main(String[] args) {
        ImageIcon icon = new ImageIcon(TestImageCenter.class.getResource("/resources/images/imagen.png"));
        JLabel iconLabel = new JLabel(icon);
        JPanel iconPanel = new JPanel(new GridBagLayout());
        iconPanel.add(iconLabel);

        JPanel textPanel= new JPanel(new GridLayout(0, 1));
        for (int i = 0; i < 10; i++) {
            textPanel.add(new JLabel("Hello, Oracle Communities"));
        }

        JPanel mainPanel = new JPanel(new BorderLayout());
        mainPanel.add(textPanel);
        mainPanel.add(iconPanel, BorderLayout.WEST);
        JOptionPane.showMessageDialog(null, mainPanel, "Center Image Dialog", JOptionPane.PLAIN_MESSAGE);
    }
}

Reda Mokrane

There is no error, the icons are not showing correctly see the screen

Christian Osvaldo González

I got it.

So try this code to scale the image, 'cause that size is too large for the optionPane

ImageIcon icon = (ImageIcon)UIManager.getIcon("OptionPane.errorIcon");
Image image = icon.getImage();
Image scaledImage = image.getScaledInstance(20, 20, Image.SCALE_DEFAULT);
Icon scaledIcon = new ImageIcon( scaledImage );
yourLabel.setIcon( scaledIcon );

Reda Mokrane

Thx for your help...but the scaling will only work on fixed scale %

I did some search and look like it's a know issue, fixed on version 9 ...im using 8...

https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8151385

java - JOptionPane icon gets cropped in Windows 10 - Stack Overflow