| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.commons.math.random; |
| |
| import java.util.Random; |
| |
| /** |
| * Extension of <code>java.util.Random</code> to implement |
| * {@link RandomGenerator}. |
| * |
| * @since 1.1 |
| * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $ |
| */ |
| public class JDKRandomGenerator extends Random implements RandomGenerator { |
| |
| /** Serializable version identifier. */ |
| private static final long serialVersionUID = -7745277476784028798L; |
| |
| /** {@inheritDoc} */ |
| public void setSeed(int seed) { |
| setSeed((long) seed); |
| } |
| |
| /** {@inheritDoc} */ |
| public void setSeed(int[] seed) { |
| // the following number is the largest prime that fits in 32 bits (it is 2^32 - 5) |
| final long prime = 4294967291l; |
| |
| long combined = 0l; |
| for (int s : seed) { |
| combined = combined * prime + s; |
| } |
| setSeed(combined); |
| } |
| |
| } |