Here you can find the source of contains(JComboBox jcb, Object o, boolean caseSensitive)
public static boolean contains(JComboBox jcb, Object o, boolean caseSensitive)
//package com.java2s; /**/*from www .j a v a 2 s .co m*/ * ** * /** * Copyright (C) 2012 Jean Ollion * * * * This file is part of tango * * tango 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/>. * * @author Jean Ollion */ import javax.swing.*; public class Main { public static boolean contains(JComboBox jcb, Object o, boolean caseSensitive) { if (o == null) return false; if (caseSensitive || !(o instanceof String)) { for (int i = 0; i < jcb.getItemCount(); i++) if (jcb.getItemAt(i).equals(o)) return true; } else { String s = ((String) o).toLowerCase(); for (int i = 0; i < jcb.getItemCount(); i++) if (((String) jcb.getItemAt(i)).toLowerCase().equals(s)) return true; } return false; } }