Here you can find the source of getFirstNonEmptyIndex(final List
public static int getFirstNonEmptyIndex(final List<Collection<?>> list)
//package com.java2s; /******************************************************************************* * Copyright (c) 2010-2014 Alexander Kerner. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License.//from ww w .ja v a 2 s . com ******************************************************************************/ import java.util.Collection; import java.util.List; public class Main { public static int getFirstNonEmptyIndex(final List<Collection<?>> list) { for (int i = 0; i < list.size(); i++) { final Collection<?> o = list.get(i); if (o != null && !o.isEmpty()) { return i; } } return -1; } }