Here you can find the source of isWebLookAndFeelInstalled()
public static final boolean isWebLookAndFeelInstalled()
//package com.java2s; /*/*from w w w. j a v a 2s . com*/ * 03/30/2013 * * WebLookAndFeelUtils.java - Utility methods for applications looking to * support WebLookAndFeel. * Copyright (C) 2003 Robert Futrell * http://fifesoft.com/rtext * Licensed under a modified BSD license. * See the included license file for details. */ import javax.swing.LookAndFeel; import javax.swing.UIManager; public class Main { private static final String LAF_CLASS_NAME = "com.alee.laf.WebLookAndFeel"; public static final boolean isWebLookAndFeelInstalled() { LookAndFeel laf = UIManager.getLookAndFeel(); return isWebLookAndFeel(laf.getClass().getName()); } public static final boolean isWebLookAndFeel(String laf) { return laf.equals(LAF_CLASS_NAME); } }