Here you can find the source of addToolItems(JToolBar toolBar, JComponent... items)
public static void addToolItems(JToolBar toolBar, JComponent... items)
//package com.java2s; /*//from w w w . java 2 s .c o m * "BSLib", Brainstorm Library. * Copyright (C) 2017 by Sergey V. Zhdanovskih. * * 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/>. */ import javax.swing.*; public class Main { public static void addToolItems(JToolBar toolBar, JComponent... items) { for (JComponent item : items) { if (item == null) { toolBar.addSeparator(); } else { toolBar.add(item); } } } }