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    1   /*
    2    * Copyright 2003-2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  package org.apache.commons.math.distribution;
    17
    18  /***
    19   * The Exponential Distribution.
    20   *
    21   * Instances of ExponentialDistribution objects should be created using
    22   * {@link DistributionFactory#createExponentialDistribution(double)}.
    23   *
    24   * <p>
    25   * References:
    26   * <ul>
    27   * <li><a href="http://mathworld.wolfram.com/ExponentialDistribution.html">
    28   * Exponential Distribution</a></li>
    29   * </ul>
    30   * </p>
    31   *
    32   * @version $Revision: 155427 $ $Date: 2005-02-26 06:11:52 -0700 (Sat, 26 Feb 2005) $
    33   */
    34  public interface ExponentialDistribution extends ContinuousDistribution {
    35      /***
    36       * Modify the mean.
    37       * @param mean the new mean.
    38       */
    39      void setMean(double mean);
    40
    41      /***
    42       * Access the mean.
    43       * @return the mean.
    44       */
    45      double getMean();
    46  }