Here you can find the source of getSystemLAF()
public static LookAndFeel getSystemLAF()
//package com.java2s; /*//ww w .j a v a 2 s. c o m * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved. * * The contents of this file are subject to the terms of the GNU General Public License Version 3 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each file. */ import javax.swing.LookAndFeel; import javax.swing.UIManager; public class Main { private static LookAndFeel SYSTEM_LAF = null; public static LookAndFeel getSystemLAF() { if (SYSTEM_LAF == null) { try { SYSTEM_LAF = (LookAndFeel) Class.forName(UIManager.getSystemLookAndFeelClassName(), true, Thread.currentThread().getContextClassLoader()).newInstance(); SYSTEM_LAF.initialize(); } catch (Exception e) { throw new IllegalStateException("could not initialize " + UIManager.getSystemLookAndFeelClassName(), e); } } return SYSTEM_LAF; } }