Here you can find the source of iconToImage(Icon icon, int width, int height)
private static Image iconToImage(Icon icon, int width, int height)
//package com.java2s; /*/*from ww w . j a v a 2 s . co m*/ * #%L * gitools-ui-platform * %% * Copyright (C) 2013 Universitat Pompeu Fabra - Biomedical Genomics group * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/gpl-3.0.html>. * #L% */ import javax.swing.*; import java.awt.*; import java.awt.image.BufferedImage; public class Main { private static Image iconToImage(Icon icon, int width, int height) { int w = icon.getIconWidth(); int h = icon.getIconHeight(); boolean sameSize = w == width && h == height; if (icon instanceof ImageIcon && sameSize) { return ((ImageIcon) icon).getImage(); } else { GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice gd = ge.getDefaultScreenDevice(); GraphicsConfiguration gc = gd.getDefaultConfiguration(); BufferedImage image = gc.createCompatibleImage(w, h, Transparency.BITMASK /*TRANSLUCENT*/); Graphics2D g = image.createGraphics(); icon.paintIcon(null, g, 0, 0); g.dispose(); if (sameSize) { return image; } else { return image.getScaledInstance(width, height, Image.SCALE_SMOOTH); } } } }