Here you can find the source of isSynth()
public static boolean isSynth()
//package com.java2s; /******************************************************************************* * Copyright (c) 2010 BSI Business Systems Integration AG. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors://from w w w.j av a 2 s .co m * BSI Business Systems Integration AG - initial API and implementation ******************************************************************************/ import javax.swing.UIManager; public class Main { public static boolean isSynth() { return "SynthLookAndFeel".equals(UIManager.getLookAndFeel().getClass().getSimpleName()); } }