Java 将值数组转换为双数组
将值数组转换为双数组
实例源码：
源代码：
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//package com.nowjava;4
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public class Main {// from 时 代 J a v a 公 众 号7
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public static void main(String[] argv) throws Exception {9
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float[] v = new float[] { 34.45f, 35.45f, 36.67f, 37.78f, 37.0000f,11
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37.1234f, 67.2344f, 68.34534f, 69.87700f };13
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System.out.println(java.util.Arrays.toString(toDouble(v)));15
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}17
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public static double[] toDouble(float[] v) {20
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final double[] ans = new double[v.length];22
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for (int k = 0; k < v.length; k++)24
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ans[k] = (double) v[k];26
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return (ans);28
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}30
/**来自 31
时代Java - nowjava.com**/32
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public static double[] toDouble(long[] v) {35
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final double[] ans = new double[v.length];37
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for (int k = 0; k < v.length; k++)39
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ans[k] = (double) v[k];41
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return (ans);43
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}45
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public static double[] toDouble(int[] v) {48
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final double[] ans = new double[v.length];50
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for (int k = 0; k < v.length; k++)52
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ans[k] = (double) v[k];54
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return (ans);56
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}58
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public static double[][] toDouble(float[][] v) {61
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final double[][] ans = new double[v.length][];63
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for (int k = 0; k < v.length; k++)65
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ans[k] = toDouble(v[k]);67
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return (ans);69
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}71
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public static double[][] toDouble(long[][] v) {74
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final double[][] ans = new double[v.length][];76
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for (int k = 0; k < v.length; k++)78
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ans[k] = toDouble(v[k]);80
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return (ans);82
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}84
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public static double[][] toDouble(int[][] v) {87
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final double[][] ans = new double[v.length][];89
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for (int k = 0; k < v.length; k++)91
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ans[k] = toDouble(v[k]);93
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return (ans);95
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}97
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/**100
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* Returns a comma delimited string representing the value of the array.102
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*/104
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public static String toString(double[] array) {106
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StringBuffer buf = new StringBuffer(array.length);109
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int i;111
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for (i = 0; i < array.length - 1; i++) {113
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buf.append(array[i]);115
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buf.append(',');117
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}119
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buf.append(array[i]);121
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return buf.toString();123
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}125
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/**128
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* Returns a comma delimited string representing the value of the array.130
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*/132
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public static String toString(double[][] array) {134
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StringBuffer buf = new StringBuffer();136
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for (int k = 0; k < array.length; k++) {138
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buf.append(toString(array[k]));140
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buf.append(System.getProperty("line.separator"));142
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}144
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return buf.toString();146
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}148
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/**151
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* Returns a comma delimited string representing the value of the array.153
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*/155
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public static String toString(int[] array) {157
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StringBuffer buf = new StringBuffer(array.length);159
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int i;161
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for (i = 0; i < array.length - 1; i++) {163
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buf.append(array[i]);165
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