运行此代码时出现错误“无法从字符串转换为双精度”,有什么想法吗?
DecimalFormat df = new DecimalFormat("##.###");
String [] data = null;
data = str.split(" ");
Double bat_avg = Double.parseDouble(data[4])/Double.parseDouble(data[2]);
bat_avg = df.format(bat_avg);
System.out.println(bat_avg);
[DecimalFormat#format(double)返回一个String
,因此输出必须是这种类型,而不是Double
:]]
String output = df.format(bat_avg);
Double bat_avg = Double.parseDouble(data[4])/Double.parseDouble(data[2]);
String x = df.format(bat_avg);
double y = Double.valueOf(x);
System.out.println(y);