Java tutorial
//package com.java2s; /* * (C) Copyright Itude Mobile B.V., The Netherlands * * 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 { /** * Checks if passed object is not null (and throws {@link NullPointerException} if not). * Thrown exception contains proper message with passed object name for easier identification. * * @param objectName name of passed object * @param objectToCheck object to be checked * * @throws NullPointerException if passed object is null */ public static <T> void notNull(String objectName, T objectToCheck) { if (objectToCheck == null) throw new NullPointerException(objectName + " is null"); } }