Java tutorial
/* * Copyright (c) 2005-2011 Grameen Foundation USA * All rights reserved. * * 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. * * See also http://www.apache.org/licenses/LICENSE-2.0.html for an * explanation of the license and how it is applied. */ package org.mifos.framework.util.helpers; import java.math.BigDecimal; import org.apache.commons.lang.ObjectUtils; public class NumberUtils { public static Short convertIntegerToShort(Integer intValue) { if (intValue == null) { return null; } return intValue.shortValue(); } public static Integer convertShortToInteger(Short shortValue) { if (shortValue == null) { return null; } return shortValue.intValue(); } public static boolean isDigits(String number) { if (number == null) { return false; } if (number.startsWith("-")) { number = number.substring(1); } return org.apache.commons.lang.math.NumberUtils.isDigits(number); } public static BigDecimal getPercentage(Number part, Number full) { float fullValue = full.floatValue(); if (fullValue == 0.0) { return BigDecimal.ZERO; } return BigDecimal.valueOf(part.floatValue() / fullValue * 100f); } public static boolean isBetween(Comparable start, Comparable end, Comparable value) { return start.compareTo(value) <= 0 && end.compareTo(value) >= 0; } public static Integer nullSafeValue(Integer value, int defaultValue) { if (value == null) { return defaultValue; } return value; } public static Integer nullSafeValue(Integer value) { return nullSafeValue(value, org.apache.commons.lang.math.NumberUtils.INTEGER_ZERO); } public static <T extends Comparable<T>> T min(T comparable1, T comparable2) { return (T) ObjectUtils.min(comparable1, comparable2); } public static <T extends Comparable<T>> T max(T comparable1, T comparable2) { return (T) ObjectUtils.max(comparable1, comparable2); } public static <T extends Comparable<T>> boolean isSecondValueGreaterThanFirstValue(T first, T second) { return first == null || second != null && second.compareTo(first) > 0; } }