Here you can find the source of indexOf(Object obj, ListModel model)
public static int indexOf(Object obj, ListModel model)
//package com.java2s; /*/*from ww w .java 2 s . c o m*/ ItsNat Java Web Application Framework Copyright (C) 2007-2011 Jose Maria Arranz Santamaria, Spanish citizen This software is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This software 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.ListModel; public class Main { public static int indexOf(Object obj, ListModel model) { return indexOf(obj, 0, model); } public static int indexOf(Object obj, int index, ListModel model) { if (obj == null) return -1; int size = model.getSize(); for (int i = index; i < size; i++) { Object currObj = model.getElementAt(i); if (currObj.equals(obj)) return i; } return -1; } }