Java tutorial
/* * Copyright (c) 2011-2019 Contributors to the Eclipse Foundation * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License 2.0 which is available at * http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 * which is available at https://www.apache.org/licenses/LICENSE-2.0. * * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 */ package io.vertx.core.impl; /** * Helper class to perform extended checks on arguments analogous to * {@link java.util.Objects#requireNonNull(Object, String)}. */ public class Arguments { /** * Checks that the specified condition is fulfilled and throws a customized {@link IllegalArgumentException} if it * is {@code false}. * @param condition condition which must be fulfilled * @param message detail message to be used in the event that a {@code * IllegalArgumentException} is thrown */ public static void require(boolean condition, String message) { if (!condition) { throw new IllegalArgumentException(message); } } /** * Checks that the specified number is within the specified minimum and maximum range (inclusively) and throws a * customized {@link IllegalArgumentException} if not. * @param number value to check * @param min minimum allowed value * @param max maximum allowed value * @param message detail message to be used in the event that a {@code * IllegalArgumentException} is thrown */ public static void requireInRange(int number, int min, int max, String message) { if (number < min || number > max) { throw new IllegalArgumentException(message); } } }