Here you can find the source of isWindowsLookAndFeel()
public static boolean isWindowsLookAndFeel()
//package com.java2s; /*//from w w w .j a va2 s. c o m * UIUtils.java * * Copyright (C) 2002-2015 Takis Diakoumis * * 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 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/>. * */ import javax.swing.UIManager; public class Main { /** * Returns whether the current applied look and feel is * the WindowsLookAndFeel * * @return true | false */ public static boolean isWindowsLookAndFeel() { return isLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); } private static boolean isLookAndFeel(String name) { return UIManager.getLookAndFeel().getClass().getName().equals(name); } }