Here you can find the source of fixJMenuBug()
private static final void fixJMenuBug()
//package com.java2s; /*/*from w ww. j a v a 2 s .com*/ * #%L * LA-iMageS GUI * %% * Copyright (C) 2016 Marco Aur?lio Zezzi Arruda, Gustavo de Souza * Pess?a, Jos? Luis Capelo Mart?nez, Florentino Fdez-Riverola, Miguel * Reboiro-Jato, Hugo L?pez-Fdez, and Daniel Glez-Pe?a * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/gpl-3.0.html>. * #L% */ import javax.swing.JPopupMenu; import javax.swing.ToolTipManager; public class Main { /** * Call the following two methods to avoid that JMenu's are rendered * behind ElementDataView canvas. */ private static final void fixJMenuBug() { JPopupMenu.setDefaultLightWeightPopupEnabled(false); ToolTipManager.sharedInstance().setLightWeightPopupEnabled(false); } }