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计算双精度数组的平均值
/* N o w J a v a . c o m 提供 */ //package com.nowjava; public class Main { public static void main(String[] argv) throws Exception { double[] v = new double[] { 34.45, 35.45, 36.67, 37.78, 37.0000, 37.1234, 67.2344, 68.34534, 69.87700 }; System.out.println(mean(v)); } /** * Computes the mean. */ public static double mean(double[] v) { if (v.length == 0) throw new IllegalArgumentException( "Nothing to compute! The array must have at least one element."); return (mass(v) / (double) v.length); }/*来自 时代Java*/ /** * Computes the mean. */ public static double mean(int[] v) { if (v.length == 0) throw new IllegalArgumentException( "Nothing to compute! The array must have at least one element."); return (mass(v) / (double) v.length); } /** * Returns the sum of the elements of the array. */ public static double mass(double[] v) { double somme = 0.0; for (int k = 0; k < v.length; k++) { somme += v[k]; } return (somme); }