Here you can find the source of isWindowsLaF()
public static boolean isWindowsLaF()
//package com.java2s; /*/* ww w.j a va 2 s .c o m*/ * Copyright (c) 2008, 2009, 2010, 2011 Denis Tulskiy * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * version 3 along with this work. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.UIManager; public class Main { public static boolean isWindowsLaF() { return UIManager.getLookAndFeel().getName().contains("Windows"); } }