--- /dev/null
+/*
+ * Copyright (C) 2018 Free Software Foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mxchange.jcoreee.utils;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+/**
+ * Null-safe utilities class for numbers
+ * <p>
+ * @author Roland Häder<roland@mxchange.org>
+ */
+public class CoreNumberUtils implements Serializable {
+
+ /**
+ * Serial number
+ */
+ private static final long serialVersionUID = 153_746_766_826_120L;
+
+ /**
+ * Compares both Integer instances null-safe following the rules of
+ * Comparable.compareTo().
+ * <p>
+ * @param integer1 Integer instance 1
+ * @param integer2 Integer instance 2
+ * <p>
+ * @return Comparison value
+ */
+ public static int compare (final Integer integer1, final Integer integer2) {
+ // Check instances
+ if (Objects.equals(integer1, integer2)) {
+ // Both objects are equal
+ return 0;
+ } else if (null == integer1) {
+ // First number is null (means is smaller than 0)
+ return -1;
+ } else if (null == integer2) {
+ // Second number is null (means is smaller than 0)
+ return 1;
+ }
+
+ // Compare vaules null-safe
+ return Integer.compare(integer1, integer2);
+ }
+
+ /**
+ * Compares both Long instances null-safe following the rules of
+ * Comparable.compareTo().
+ * <p>
+ * @param long1 Long instance 1
+ * @param long2 Long instance 2
+ * <p>
+ * @return Comparison value
+ */
+ public static int compare (final Long long1, final Long long2) {
+ // Check instances
+ if (Objects.equals(long1, long2)) {
+ // Both objects are equal
+ return 0;
+ } else if (null == long1) {
+ // First number is null (means is smaller than 0)
+ return -1;
+ } else if (null == long2) {
+ // Second number is null (means is smaller than 0)
+ return 1;
+ }
+
+ // Compare vaules null-safe
+ return Long.compare(long1, long2);
+ }
+
+ /**
+ * Compares both Short instances null-safe following the rules of
+ * Comparable.compareTo().
+ * <p>
+ * @param short1 Short instance 1
+ * @param short2 Short instance 2
+ * <p>
+ * @return Comparison value
+ */
+ public static int compare (final Short short1, final Short short2) {
+ // Check instances
+ if (Objects.equals(short1, short2)) {
+ // Both objects are equal
+ return 0;
+ } else if (null == short1) {
+ // First number is null (means is smaller than 0)
+ return -1;
+ } else if (null == short2) {
+ // Second number is null (means is smaller than 0)
+ return 1;
+ }
+
+ // Compare vaules null-safe
+ return Short.compare(short1, short2);
+ }
+
+ /**
+ * Utilities classes should not have instances
+ */
+ private CoreNumberUtils () {
+ // Private constructor
+ }
+
+}