Here you can find the source of getIcon(File file)
public static Icon getIcon(File file)
//package com.java2s; /************************************************************************* /* ww w .ja v a 2s . c om*/ Copyright (C) 2009 Grandite This file is part of Open ModelSphere. Open ModelSphere 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or see http://www.gnu.org/licenses/. You can redistribute and/or modify this particular file even under the terms of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. You should have received a copy of the GNU Lesser General Public License (LGPL) along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or see http://www.gnu.org/licenses/. You can reach Grandite at: 20-1220 Lebourgneuf Blvd. Quebec, QC Canada G2K 2G4 or open-modelsphere@grandite.com **********************************************************************/ import java.io.File; import javax.swing.Icon; import javax.swing.JFileChooser; public class Main { private static final JFileChooser basicChooser = new JFileChooser(); public static Icon getIcon(File file) { if (file == null) { return null; } return basicChooser.getIcon(file); } }