Here you can find the source of getThumbnail(ImageIcon src, int maxWidth)
public static ImageIcon getThumbnail(ImageIcon src, int maxWidth)
//package com.java2s; /*/*from ww w. j a v a 2s . c om*/ * (c) Copyright 2010-2011 AgileBirds * * This file is part of OpenFlexo. * * OpenFlexo 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. * * OpenFlexo 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 OpenFlexo. If not, see <http://www.gnu.org/licenses/>. * */ import java.awt.Image; import javax.swing.ImageIcon; public class Main { public static ImageIcon getThumbnail(ImageIcon src, int maxWidth) { if (src != null) { if (src.getIconWidth() > maxWidth) { return new ImageIcon(src.getImage().getScaledInstance(maxWidth, -1, Image.SCALE_SMOOTH)); } else { //no need to miniaturize return src; } } return null; } }