Here you can find the source of scale(ImageIcon original, int width, int height)
private static ImageIcon scale(ImageIcon original, int width, int height)
//package com.java2s; /*// w ww.j a v a 2 s . c om * This file is part of qSim. * * qSim 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. * * qSim 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 qSim. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.*; import javax.swing.ImageIcon; public class Main { private static ImageIcon scale(ImageIcon original, int width, int height) { 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); } }