Here you can find the source of toDouble(float[] a)
public static double[] toDouble(float[] a)
//package com.java2s; /**// w w w.j a v a 2 s .co m * * Copyright 2017 Florian Erhard * * 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. * */ public class Main { public static double[] toDouble(float[] a) { double[] re = new double[a.length]; for (int i = 0; i < re.length; i++) re[i] = (double) a[i]; return re; } public static double[] toDouble(String[] a) { double[] re = new double[a.length]; for (int i = 0; i < re.length; i++) re[i] = Double.parseDouble(a[i]); return re; } public static double[] toDouble(int[] a) { double[] re = new double[a.length]; for (int i = 0; i < re.length; i++) re[i] = (double) a[i]; return re; } }