How to make Circle image shortcut in Java?

Question

How to make Circle image shortcut in Java?

I want to make a circular image. Shortcut But I can’t do it .. Hey guys help me ..TT

I tried making a circle bar to add an image icon, but that didn't work.

help me please...

Answer 1

I think you should change your approach, instead of trying to change the component output, change the input instead ...

So, all this does, applies a circular (alpha-based) mask to another image

    BufferedImage master = ImageIO.read(new File("/Volumes/Disk02/Dropbox/MegaTokyo/thumnails/megatokyo_omnibus_1_3_cover_by_fredrin-d4oupef.jpg"));

    int diameter = Math.min(master.getWidth(), master.getHeight());
    BufferedImage mask = new BufferedImage(master.getWidth(), master.getHeight(), BufferedImage.TYPE_INT_ARGB);

    Graphics2D g2d = mask.createGraphics();
    applyQualityRenderingHints(g2d);
    g2d.fillOval(0, 0, diameter - 1, diameter - 1);
    g2d.dispose();

    BufferedImage masked = new BufferedImage(diameter, diameter, BufferedImage.TYPE_INT_ARGB);
    g2d = masked.createGraphics();
    applyQualityRenderingHints(g2d);
    int x = (diameter - master.getWidth()) / 2;
    int y = (diameter - master.getHeight()) / 2;
    g2d.drawImage(master, x, y, null);
    g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.DST_IN));
    g2d.drawImage(mask, 0, 0, null);
    g2d.dispose();

    JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(masked)));

The advantage of this is that you can get soft cropping (which setClipdoes not provide), and also not mess with the existing cropping form of the component

applyQualityRenderingHints...

public static void applyQualityRenderingHints(Graphics2D g2d) {

    g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
    g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
    g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);

}

Answer 2

Area :

BufferedImage image = ImageIO.read(new File("..."));
Area clip = new Area( new Rectangle(0, 0, image.getWidth(), image.getHeight()) );
Area oval = new Area( new Ellipse2D.Double(0, 0, image.getWidth() - 1, image.getHeight() - 1) );
clip.subtract( oval );
Graphics g2d = image.createGraphics();
g2d.setClip( clip );
g2d.setColor( Color.BLACK );
g2d.fillRect(0, 0, image.getWidth(), image.getHeight());
JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(image)));