Java 求所有分量的平方和；也称为数组的能量。
对所有分量的平方求和；也称为阵列的能量。
实例源码：
源代码：
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/** 来 自 n o w j a v a . c o m**/2
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//package com.nowjava;5
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public class Main {8
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public static void main(String[] argv) throws Exception {10
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double[] data = new double[] { 34.45, 35.45, 36.67, 37.78, 37.0000,12
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37.1234, 67.2344, 68.34534, 69.87700 };14
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System.out.println(sumSquares(data));16
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}18
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/**21
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* Sums the squares of all components;23
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* also called the energy of the array.25
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*/27
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public static double sumSquares(double[] data) {29
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double ans = 0.0;31
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for (int k = 0; k < data.length; k++) {33
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ans += data[k] * data[k];35
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}37
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return (ans);39
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}41
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/**44
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* Sums the squares of all components;46
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* also called the energy of the array.48
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*///NowJava.com - 时 代 Java 提供50
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public static double sumSquares(double[][] data) {52
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double ans = 0.0;54
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for (int k = 0; k < data.length; k++) {56
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for (int l = 0; l < data[k].length; l++) {58
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ans += data[k][l] * data[k][l];60
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}62
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}64
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return (ans);66
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}68
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/**71
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* Sums the squares of all components;73
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* also called the energy of the array.75
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*/77
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public static int sumSquares(int[] data) {79
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int ans = 0;81
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for (int k = 0; k < data.length; k++) {83
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ans += data[k] * data[k];85
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}87
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return (ans);89
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}91
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/**94
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* Sums the squares of all components;96
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* also called the energy of the array.98
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*/100
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