Here you can find the source of usingMetalLnf()
public static boolean usingMetalLnf()
//package com.java2s; /*/*from w ww .j a va 2 s. com*/ * Copyright 2004 - 2013 Wayne Grant * 2013 - 2016 Kai Kramer * * This file is part of KeyStore Explorer. * * KeyStore Explorer 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. * * KeyStore Explorer 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 KeyStore Explorer. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.UIManager; import javax.swing.plaf.metal.MetalLookAndFeel; public class Main { /** * Is the Metal l&f currently being used? * * @return True if it is */ public static boolean usingMetalLnf() { return usingLnf(MetalLookAndFeel.class); } /** * Is the supplied l&f currently being used? * * @return l&f class */ private static boolean usingLnf(Class lnfClass) { String currentLnfClass = UIManager.getLookAndFeel().getClass() .getName(); return currentLnfClass.equals(lnfClass.getName()); } }