decimalformat

问题 This question already has answers here : Round a double to 2 decimal places [duplicate] (13 answers) Closed 6 years ago . I have a short equation: double compute,computed2; compute=getminutes/60; where getminutes is int and I want to set the equivalent of compute with 2 decimal places. 0.00 how can I format the equivalent with 2 decimal places? Example: compute=45/60 it should be 0.75 Here is my work: DecimalFormat df2 = new DecimalFormat("00.00000"); double computed,computed2 = 00.000;

问题 This question already has answers here : Round a double to 2 decimal places [duplicate] (13 answers) Closed 6 years ago . I have a short equation: double compute,computed2; compute=getminutes/60; where getminutes is int and I want to set the equivalent of compute with 2 decimal places. 0.00 how can I format the equivalent with 2 decimal places? Example: compute=45/60 it should be 0.75 Here is my work: DecimalFormat df2 = new DecimalFormat("00.00000"); double computed,computed2 = 00.000;

问题 I'm using DecimalFormat to format doubles to 2 decimal places like this: DecimalFormat dec = new DecimalFormat("#.##"); double rawPercent = ( (double)(count.getCount().intValue()) / (double)(total.intValue()) ) * 100.00; double percentage = Double.valueOf(dec.format(rawPercent)); It works, but if i have a number like 20, it gives me this: 20.0 and I want this: 20.00 Any suggestions? 回答1: The DecimalFormat class is for transforming a decimal numeric value into a String. In your example, you

问题 I have this little crazy method that converts BigDecimal values into nice and readable Strings. private String formatBigDecimal(BigDecimal bd){ DecimalFormat df = new DecimalFormat(); df.setMinimumFractionDigits(3); df.setMaximumFractionDigits(3); df.setMinimumIntegerDigits(1); df.setMaximumIntegerDigits(3); df.setGroupingSize(20); return df.format(bd); } It however, also produces a so called grouping separator "," that makes all my values come out like this: xxx,xxx I do need the separator

问题 I am converting a double value to currency string format and it gets converted string with pound symbol currency. Is it culture dependent? 回答1: If you always want to use a a specific locale, which may be desirable if your server target is hosted in a different timezone, etc... ToString() can be supplied with a CultureInfo argument. How to convert string to double with proper cultureinfo If you want to tailor it to the user's locale, You might be able to examine the request values: Get

问题 Can someone explain to me why the below code gives this output? 1.2 null Running the following code: String positive = "1.2+"; String negative = "1.2-"; DecimalFormat format = new DecimalFormat("0.0"); format.setPositiveSuffix("+"); format.setNegativeSuffix("-"); format.setDecimalFormatSymbols(DecimalFormatSymbols.getInstance(Locale.US)); System.out.println(format.parse(positive, new ParsePosition(0))); System.out.println(format.parse(negative, new ParsePosition(0))); This works though, but I

问题 I am developing an Android app where I want to format my double number to #.##, which I have done using below code. Double BMI = ((fWeight)/(dHeight*dHeight)); DecimalFormat df = new DecimalFormat("0.00"); String sBMI = df.format(BMI); While testing when the language of hardware is set to English(default language), it works fine, for example if BMI is 2497.227216676656 , it formats sBMI to 2497.23 , but if language is selected to French it formats it to 2497,23. In place of DOT, COMMA is

问题 I have a double and i am trying to convert it to a decimal. When i use decimalformat to achieve this i get the following: public void roundNumber(){ double d = 2.081641999208976E-4; JOptionPane.showMessageDialog(null,roundFiveDecimals(d)); } public double roundFiveDecimals(double d) { DecimalFormat df = new DecimalFormat("#.#####"); return Double.valueOf(df.format(d)); } I want the output to be .00021; however, i get 2.1E-4. Can anyone help explain how to get .00021 and not 2.1E-4? 回答1: You

问题 This relates to my previous question, which can be found at: Math equation result loses decimals when displayed In my assignment, we have to calculate the perimeter of an isosceles trapezoid. The perimeter the needs to be formatted to 4 decimal places. If the result after the decimal place is all zeros, then don’t display the zeros. (Example: the results are 12.000000 what will be displayed is 12.) Also if the result is greater than 1000 before the decimal, then the comma must be displayed.

问题 I need to format a number with scale of 2 decimal places. The original number may be a whole number or a number with three decimal places. However the result should be formatted to have commas and also two decimal places always regardless of whether the original number is whole number or having decimal places. When original num = 56565656.342 ==> I need 56,565,656.34 When original num = 56565656 ==> I need 56,565,656.00 When original num = 56565656.7 ==> I need 56,565,656.70 I am using the