Here you can find the source of size(List
public static <T> int size(List<T> list)
//package com.java2s; /******************************************************************************* * Copyright (c) 2010 BSI Business Systems Integration AG. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * /* w ww.ja va2 s. c o m*/ * Contributors: * BSI Business Systems Integration AG - initial API and implementation ******************************************************************************/ import java.util.List; public class Main { public static <T> int size(List<T> list) { if (list == null) { return 0; } return list.size(); } }