Here you can find the source of useLNF()
public static void useLNF()
//package com.java2s; //License from project: Apache License public class Main { public static void useLNF() { try {//from w w w . java 2 s . c om javax.swing.UIManager.setLookAndFeel("com.birosoft.liquid.LiquidLookAndFeel"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }