Calculate the minimum and maximum values out of a list of doubles. : ListActivity « UI « Android






  1. Android
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  3. ListActivity

Calculate the minimum and maximum values out of a list of doubles.

   
/**
 * Copyright (C) 2009, 2010 SC 4ViewSoft SRL
 *  
 * 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.
 */
//package org.achartengine.util;

import java.text.NumberFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;

/**
 * Utility class for math operations.
 */
 class MathHelper {
  /** A value that is used a null value. */
  public static final double NULL_VALUE = Double.MAX_VALUE;
  /**
   * A number formatter to be used to make sure we have a maximum number of
   * fraction digits in the labels.
   */
  private static final NumberFormat FORMAT = NumberFormat.getNumberInstance();

  private MathHelper() {
    // empty constructor
  }

  /**
   * Calculate the minimum and maximum values out of a list of doubles.
   * 
   * @param values the input values
   * @return an array with the minimum and maximum values
   */
  public static double[] minmax(List<Double> values) {
    if (values.size() == 0) {
      return new double[2];
    }
    double min = values.get(0);
    double max = min;
    int length = values.size();
    for (int i = 1; i < length; i++) {
      double value = values.get(i);
      min = Math.min(min, value);
      max = Math.max(max, value);
    }
    return new double[] { min, max };
  }

  }








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