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Update #0 - First Release
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sources/main/java/org/apache/commons/lang3/math/Fraction.java
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1025
sources/main/java/org/apache/commons/lang3/math/Fraction.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.lang3.math;
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import org.apache.commons.lang3.Validate;
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/**
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* <p>
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* Provides IEEE-754r variants of NumberUtils methods.
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* </p>
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*
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* <p>
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* See: <a href=
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* "http://en.wikipedia.org/wiki/IEEE_754r">http://en.wikipedia.org/wiki/IEEE_754r</a>
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* </p>
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*
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* @since 2.4
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*/
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public class IEEE754rUtils {
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/**
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* <p>
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* Returns the minimum value in an array.
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* </p>
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*
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* @param array an array, must not be null or empty
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* @return the minimum value in the array
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* @throws NullPointerException if {@code array} is {@code null}
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* @throws IllegalArgumentException if {@code array} is empty
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* @since 3.4 Changed signature from min(double[]) to min(double...)
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*/
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public static double min(final double... array) {
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Validate.notNull(array, "array");
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Validate.isTrue(array.length != 0, "Array cannot be empty.");
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// Finds and returns min
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double min = array[0];
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for (int i = 1; i < array.length; i++) {
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min = min(array[i], min);
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}
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return min;
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}
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/**
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* <p>
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* Returns the minimum value in an array.
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* </p>
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*
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* @param array an array, must not be null or empty
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* @return the minimum value in the array
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* @throws NullPointerException if {@code array} is {@code null}
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* @throws IllegalArgumentException if {@code array} is empty
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* @since 3.4 Changed signature from min(float[]) to min(float...)
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*/
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public static float min(final float... array) {
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Validate.notNull(array, "array");
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Validate.isTrue(array.length != 0, "Array cannot be empty.");
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// Finds and returns min
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float min = array[0];
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for (int i = 1; i < array.length; i++) {
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min = min(array[i], min);
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}
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return min;
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}
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/**
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* <p>
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* Gets the minimum of three {@code double} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @param c value 3
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* @return the smallest of the values
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*/
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public static double min(final double a, final double b, final double c) {
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return min(min(a, b), c);
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}
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/**
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* <p>
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* Gets the minimum of two {@code double} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @return the smallest of the values
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*/
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public static double min(final double a, final double b) {
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if (Double.isNaN(a)) {
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return b;
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} else if (Double.isNaN(b)) {
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return a;
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} else {
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return Math.min(a, b);
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}
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}
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/**
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* <p>
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* Gets the minimum of three {@code float} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @param c value 3
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* @return the smallest of the values
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*/
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public static float min(final float a, final float b, final float c) {
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return min(min(a, b), c);
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}
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/**
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* <p>
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* Gets the minimum of two {@code float} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @return the smallest of the values
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*/
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public static float min(final float a, final float b) {
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if (Float.isNaN(a)) {
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return b;
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} else if (Float.isNaN(b)) {
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return a;
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} else {
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return Math.min(a, b);
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}
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}
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/**
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* <p>
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* Returns the maximum value in an array.
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* </p>
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*
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* @param array an array, must not be null or empty
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* @return the minimum value in the array
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* @throws NullPointerException if {@code array} is {@code null}
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* @throws IllegalArgumentException if {@code array} is empty
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* @since 3.4 Changed signature from max(double[]) to max(double...)
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*/
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public static double max(final double... array) {
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Validate.notNull(array, "array");
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Validate.isTrue(array.length != 0, "Array cannot be empty.");
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// Finds and returns max
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double max = array[0];
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for (int j = 1; j < array.length; j++) {
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max = max(array[j], max);
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}
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return max;
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}
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/**
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* <p>
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* Returns the maximum value in an array.
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* </p>
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*
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* @param array an array, must not be null or empty
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* @return the minimum value in the array
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* @throws NullPointerException if {@code array} is {@code null}
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* @throws IllegalArgumentException if {@code array} is empty
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* @since 3.4 Changed signature from max(float[]) to max(float...)
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*/
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public static float max(final float... array) {
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Validate.notNull(array, "array");
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Validate.isTrue(array.length != 0, "Array cannot be empty.");
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// Finds and returns max
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float max = array[0];
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for (int j = 1; j < array.length; j++) {
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max = max(array[j], max);
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}
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return max;
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}
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/**
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* <p>
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* Gets the maximum of three {@code double} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @param c value 3
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* @return the largest of the values
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*/
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public static double max(final double a, final double b, final double c) {
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return max(max(a, b), c);
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}
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/**
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* <p>
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* Gets the maximum of two {@code double} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @return the largest of the values
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*/
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public static double max(final double a, final double b) {
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if (Double.isNaN(a)) {
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return b;
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} else if (Double.isNaN(b)) {
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return a;
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} else {
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return Math.max(a, b);
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}
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}
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/**
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* <p>
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* Gets the maximum of three {@code float} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @param c value 3
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* @return the largest of the values
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*/
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public static float max(final float a, final float b, final float c) {
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return max(max(a, b), c);
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}
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/**
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* <p>
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* Gets the maximum of two {@code float} values.
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* </p>
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*
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* <p>
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* NaN is only returned if all numbers are NaN as per IEEE-754r.
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* </p>
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*
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* @param a value 1
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* @param b value 2
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* @return the largest of the values
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*/
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public static float max(final float a, final float b) {
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if (Float.isNaN(a)) {
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return b;
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} else if (Float.isNaN(b)) {
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return a;
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} else {
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return Math.max(a, b);
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}
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}
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}
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2027
sources/main/java/org/apache/commons/lang3/math/NumberUtils.java
Normal file
2027
sources/main/java/org/apache/commons/lang3/math/NumberUtils.java
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File diff suppressed because it is too large
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@ -0,0 +1,47 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* <p>
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* Extends {@link java.math} for business mathematical classes. This package is
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* intended for business mathematical use, not scientific use. See
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* <a href="https://commons.apache.org/math/">Commons Math</a> for a more
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* complete set of mathematical classes. These classes are immutable, and
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* therefore thread-safe.
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* </p>
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*
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* <p>
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* Although Commons Math also exists, some basic mathematical functions are
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* contained within Lang. These include classes to a
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* {@link org.apache.commons.lang3.math.Fraction} class, various utilities for
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* random numbers, and the flagship class,
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* {@link org.apache.commons.lang3.math.NumberUtils} which contains a handful of
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* classic number functions.
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* </p>
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*
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* <p>
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* There are two aspects of this package that should be highlighted. The first
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* is {@link org.apache.commons.lang3.math.NumberUtils#createNumber(String)}, a
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* method which does its best to convert a String into a
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* {@link java.lang.Number} object. You have no idea what type of Number it will
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* return, so you should call the relevant {@code xxxValue} method when you
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* reach the point of needing a number. NumberUtils also has a related
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* {@link org.apache.commons.lang3.math.NumberUtils#isCreatable(String)} method.
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* </p>
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*
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* @since 2.0
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*/
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package org.apache.commons.lang3.math;
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