Here you can find the source of toJSONValue(Enum> e)
private static String toJSONValue(Enum<?> e)
//package com.java2s; /*/* w w w .j a v a 2s . co m*/ * Copyright (c) 2012-2017 ZoxWeb.com LLC. * * 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. */ public class Main { private static String toJSONValue(Enum<?> e) { if (e == null) { return null; } return e.name(); } }