Here you can find the source of sort(Map
public static Map<String, Object> sort(Map<String, Object> map)
//package com.java2s; /*//from ww w .j a v a2 s. c om * Copyright 2012 ReachLocal Inc. * * 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. */ import java.util.*; public class Main { public static Map<String, Object> sort(Map<String, Object> map) { Map<String, Object> sorted = new LinkedHashMap<String, Object>(); List<String> keys = new ArrayList<String>(map.size()); keys.addAll(map.keySet()); Collections.sort(keys); for (String key : keys) { sorted.put(key, map.get(key)); } return sorted; } }