Here you can find the source of supportsDarkLookAndFeel()
public static boolean supportsDarkLookAndFeel()
//package com.java2s; /*/*from w w w . j a v a 2s.c om*/ * Copyright 2012-2014 Dan Cioca * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import javax.swing.UIManager; public class Main { public static final String DARK_LAF_NAME = "Darcula"; public static boolean supportsDarkLookAndFeel() { if (isDarkLookAndFeel()) return true; for (UIManager.LookAndFeelInfo lookAndFeelInfo : UIManager.getInstalledLookAndFeels()) { if (lookAndFeelInfo.getName().contains(DARK_LAF_NAME)) return true; } return false; } public static boolean isDarkLookAndFeel() { return UIManager.getLookAndFeel().getName().contains(DARK_LAF_NAME); } }