Here you can find the source of notNull(String message, Object obj)
public static void notNull(String message, Object obj)
//package com.java2s; /******************************************************************************* * Copyright (c) 2016 eBay Software Foundation. * * 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 w ww . jav a2 s . c om *******************************************************************************/ import org.slf4j.Logger; public class Main { public static void notNull(String message, Object obj) { if (obj == null) { throw new NullPointerException(message); } } public static void notNull(String message, Object obj, Logger logger) { if (obj == null) { logger.error(message); throw new NullPointerException(message); } } }