Here you can find the source of doubleToDoubleArray(double... a)
public static Double[] doubleToDoubleArray(double... a)
//package com.java2s; /*//from w ww . ja va 2s . c o m * Copyright 2004-2010 Information & Software Engineering Group (188/1) * Institute of Software Technology and Interactive Systems * Vienna University of Technology, Austria * * 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.ifs.tuwien.ac.at/dm/somtoolbox/license.html * * 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. */ public class Main { /** Converts a double[] to a Double[] (auto-boxing doesn't work for arrays...) */ public static Double[] doubleToDoubleArray(double... a) { Double[] aDouble = new Double[a.length]; for (int i = 0; i < a.length; i++) { aDouble[i] = a[i]; } return aDouble; } }