Here you can find the source of median(final double... in)
public static double median(final double... in)
//package com.java2s; /*//from w w w .j a va 2 s.c om * The MIT License * * Copyright (c) 2011 The Broad Institute * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import java.util.Arrays; public class Main { /** Calculate the median of an array of doubles. Assumes that the input is sorted */ public static double median(final double... in) { if (in.length == 0) { throw new IllegalArgumentException("Attempting to find the median of an empty array"); } final double[] data = Arrays.copyOf(in, in.length); Arrays.sort(data); final int middle = data.length / 2; return data.length % 2 == 1 ? data[middle] : (data[middle - 1] + data[middle]) / 2.0; } }