- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2002 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowledgement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgement may appear in the software itself,
- * if and wherever such third-party acknowledgements normally appear.
- *
- * 4. The names "The Jakarta Project", "Commons", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- package org.apache.commons.lang.math;
-
- import java.util.Random;
-
- /**
- * <p><code>RandomUtils</code> is a wrapper that supports all possible
- * {@link java.util.Random} methods via the {@link java.lang.Math#random()}
- * method and its system-wide <code>Random</code> object.
- *
- * @author Henri Yandell
- * @since 2.0
- * @version $Id: RandomUtils.java,v 1.6 2003/08/18 02:22:24 bayard Exp $
- */
- public class RandomUtils {
-
- public static final Random JVM_RANDOM = new JVMRandom();
-
- // should be possible for JVM_RANDOM?
- // public static void nextBytes(byte[]) {
- // public synchronized double nextGaussian();
- // }
-
- /**
- * <p>Returns the next pseudorandom, uniformly distributed int value
- * from the Math.random() sequence.</p>
- *
- * @return the random int
- */
- public static int nextInt() {
- return nextInt(JVM_RANDOM);
- }
- public static int nextInt(Random rnd) {
- return rnd.nextInt();
- }
- /**
- * <p>Returns a pseudorandom, uniformly distributed int value
- * between <code>0</code> (inclusive) and the specified value
- * (exclusive), from the Math.random() sequence.</p>
- *
- * @param n the specified exclusive max-value
- *
- * @return the random int
- */
- public static int nextInt(int n) {
- return nextInt(JVM_RANDOM, n);
- }
- public static int nextInt(Random rnd, int n) {
- // check this cannot return 'n'
- return rnd.nextInt(n);
- }
- /**
- * <p>Returns the next pseudorandom, uniformly distributed long value
- * from the Math.random() sequence.</p>
- *
- * @return the random long
- */
- public static long nextLong() {
- return nextLong(JVM_RANDOM);
- }
- public static long nextLong(Random rnd) {
- return rnd.nextLong();
- }
- /**
- * <p>Returns the next pseudorandom, uniformly distributed boolean value
- * from the Math.random() sequence.</p>
- *
- * @return the random boolean
- */
- public static boolean nextBoolean() {
- return nextBoolean(JVM_RANDOM);
- }
- public static boolean nextBoolean(Random rnd) {
- return rnd.nextBoolean();
- }
- /**
- * <p>Returns the next pseudorandom, uniformly distributed float value
- * between <code>0.0</code> and <code>1.0</code> from the Math.random()
- * sequence.</p>
- *
- * @return the random float
- */
- public static float nextFloat() {
- return nextFloat(JVM_RANDOM);
- }
- public static float nextFloat(Random rnd) {
- return rnd.nextFloat();
- }
- /**
- * <p>Synonymous to the Math.random() call.</p>
- *
- * @return the random double
- */
- public static double nextDouble() {
- return nextDouble(JVM_RANDOM);
- }
- public static double nextDouble(Random rnd) {
- return rnd.nextDouble();
- }
-
- }