Java Utililty Methods ImageIcon Scale

ImageIcon getScaledImageIcon(final String location, final int width, final int height)
Get an image as a resource and create an ImageIcon

ImageIcon icon = null;
URL url = Thread.currentThread().getContextClassLoader().getResource(location);
if (url != null) {
 icon = new ImageIcon(url);
 icon = new ImageIcon(icon.getImage().getScaledInstance(width, height, Image.SCALE_SMOOTH));
return (icon);

ImageIcon getScaledImageIconHeight(ImageIcon ii, int h, boolean incr)
get Scaled Image Icon Height

if (ii != null) {
 if (ii.getIconWidth() > h || incr) {
 ii = new ImageIcon(ii.getImage().getScaledInstance(-1, h, Image.SCALE_DEFAULT));
return ii;

ImageIcon rescale(ImageIcon src, Dimension newMinSize, ImageObserver observer)
Rescales an icon.

double widthRatio = newMinSize.getWidth() / (double) src.getIconWidth();
double heightRatio = newMinSize.getHeight() / (double) src.getIconHeight();
double scale = widthRatio > heightRatio ? widthRatio : heightRatio;
int w = (int) Math.round(scale * src.getIconWidth());
int h = (int) Math.round(scale * src.getIconHeight());
BufferedImage dst = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = dst.createGraphics();
g2.drawImage(src.getImage(), 0, 0, w, h, observer);
...

ImageIcon rescaleImageIcon(ImageIcon image, int size)
rescale Image Icon

final BufferedImage img = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
final Graphics2D g2d = img.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
final Image cursorImage = image.getImage();
g2d.drawImage(cursorImage, new AffineTransform((double) size / cursorImage.getWidth(null), 0, 0,
 (double) size / cursorImage.getHeight(null), 0, 0), null);
return new ImageIcon(img);

ImageIcon scale(ImageIcon icon, int maxWidth, int maxHeight)
scale

if (icon == null)
 return null;
if (maxWidth >= icon.getIconWidth() && maxHeight >= icon.getIconHeight())
 return icon;
int width = Math.min(maxWidth, icon.getIconWidth()), height = Math.min(maxHeight, icon.getIconHeight());
float widthFactor = (float) width / icon.getIconWidth(),
 heightFactor = (float) height / icon.getIconHeight();
if (widthFactor < heightFactor) {
...

ImageIcon scale(ImageIcon icon, int newHeight, int newWidth)
Returns a scaled down image if the height or width is smaller than the image size.

Image img = icon.getImage();
int height = icon.getIconHeight();
int width = icon.getIconWidth();
boolean scaleHeight = height * newWidth > width * newHeight;
if (height > newHeight) {
 if (width <= newWidth || scaleHeight) {
 height = newHeight;
 width = -1;
...

ImageIcon scale(ImageIcon original, int width, int height)
scale

if (original == null) {
 throw new IllegalArgumentException("original image is NULL");
Image img = original.getImage();
Image newimg = img.getScaledInstance(width, height, java.awt.Image.SCALE_SMOOTH);
return new ImageIcon(newimg);

Icon scaleIcon(final ImageIcon icon)
Returns a scaled icon based on the reduced font size

int scaledWidth = (int) Math.floor(icon.getIconWidth() * growthPercentage);
int scaledHeight = (int) Math.floor(icon.getIconHeight() * growthPercentage);
Image scaledInstance = icon.getImage().getScaledInstance(scaledWidth, scaledHeight,
 java.awt.Image.SCALE_SMOOTH);
return new ImageIcon(scaledInstance);

ImageIcon scaleIcon(ImageIcon icon, int size)
scale Icon

return new ImageIcon(scaleIcon(icon.getImage(), size));

ImageIcon scaleIcon(int width, int height, ImageIcon img)
Scales the given image icon to the input width/height

return new ImageIcon(scaleImage(width, height, img.getImage()));