Here you can find the source of addToMap(Map
private static void addToMap(Map<String, List<String>> cfs, String[] qualSplits, String[] splitQual)
//package com.java2s; /**//from w ww .j a v a 2s.c om * Copyright 2011 The Apache Software Foundation * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ import java.util.ArrayList; import java.util.List; import java.util.Map; public class Main { private static void addToMap(Map<String, List<String>> cfs, String[] qualSplits, String[] splitQual) { if (cfs.get(qualSplits[0]) == null) { List<String> qual = new ArrayList<String>(); qual.add(splitQual[0]); cfs.put(qualSplits[0], qual); } else { List<String> list = cfs.get(qualSplits[0]); list.add(splitQual[0]); } } }