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我试图将一个double格式化为两位小数和1位sig字符串。我的代码到目前为止,我是否正确地做?或者我不应该创建一个临时字符串?...格式化为小数点后两位和1位sig图
// sets rounding to two decimal places
DecimalFormat format_calculated_reported_concentration = new DecimalFormat("0.00");
// removes grouping seperators e.g. 1,000 becomes 1000
format_calculated_reported_concentration.setGroupingUsed(false);
/// rounds
String temp_calculated_reported_concentration =
format_calculated_reported_concentration.format(calculated_concentration);
// applies the pattern of 1 significant figure only to the decimalformat
format_calculated_reported_concentration.applyPattern("@");
// 1 sig fig
calculated_reported_concentration =
format_calculated_reported_concentration
.format(Double.valueOf(temp_calculated_reported_concentration));
请注意,您的变量使用下划线来分隔单词,但Java约定是使用camelCase。例如,'format_calculated_reported_concentration'应该是'formatCalculatedReportedConcentration'。 – 2015-02-06 22:11:27
我希望像0.006这样的东西变成0.01(2位小数,1 sig图) – 2015-02-06 22:23:04
值的范围是0.005到<0.1 – 2015-02-06 22:24:22