String format to format double in java

Question

How can I use String format format String X  to format a double like follows     2354548 235 -  2 354 548 23  Thanks

User · Answer

Use DecimalFormat   NumberFormat nf   DecimalFormat getInstance Locale ENGLISH    DecimalFormat decimalFormatter    DecimalFormat  nf   decimalFormatter applyPattern                   String fString   decimalFormatter format myDouble    System out println fString

User · Answer

If you want to format it with manually set symbols  use this   DecimalFormatSymbols decimalFormatSymbols   new DecimalFormatSymbols    decimalFormatSymbols setDecimalSeparator       decimalFormatSymbols setGroupingSeparator       DecimalFormat decimalFormat   new DecimalFormat      0 00   decimalFormatSymbols   System out println decimalFormat format 1237516 2548      1 237 516 25   Locale-based formatting is preferred  though

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code extracted from this link    Double amount   new Double 345987 246   NumberFormat numberFormatter  String amountOut   numberFormatter   NumberFormat getNumberInstance currentLocale   amountOut   numberFormatter format amount   System out println amountOut                             currentLocale toString       The output from this example shows how the format of the same number varies with Locale    345 987 246  fr FR 345 987 246  de DE 345 987 246  en US

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public class MainClass      public static void main String args          System out printf   d   d   d  05d n   3  -3  3  3        System out printf  Default floating-point format   f n   1234567 123       System out printf  Floating-point with commas    f n   1234567 123       System out printf  Negative floating-point default    f n   -1234567 123       System out printf  Negative floating-point option     f n   -1234567 123        System out printf  Line-up positive and negative values  n        System out printf      2f n    2f n   1234567 123  -1234567 123           And print out      3  3   3 00003   Default floating-point format  1234567 123000   Floating-point with commas  1 234 567 123000   Negative floating-point default  -1 234 567 123000   Negative floating-point option   1 234 567 123000           Line-up positive and negative values     1 234 567 12   -1 234 567 12

User · Answer

There are many way you can do this  Those are given bellow   Suppose your original number is given bellow          double number   2354548 235   Using NumberFormat and Rounding mode  NumberFormat nf   DecimalFormat getInstance Locale ENGLISH       DecimalFormat decimalFormatter    DecimalFormat  nf      decimalFormatter applyPattern                      decimalFormatter setRoundingMode RoundingMode CEILING        String fString   decimalFormatter format number       System out println fString     Using String formatter  System out println String format   1   2f   number      In all cases the output will be  2354548 24  Note   During rounding you can add RoundingMode in your formatter  Here are some Rounding mode given bellow       decimalFormat setRoundingMode RoundingMode CEILING       decimalFormat setRoundingMode RoundingMode FLOOR       decimalFormat setRoundingMode RoundingMode HALF DOWN       decimalFormat setRoundingMode RoundingMode HALF UP       decimalFormat setRoundingMode RoundingMode UP     Here are the imports   import java math BigDecimal  import java math RoundingMode  import java text DecimalFormat  import java text NumberFormat  import java util Locale

User · Answer

String format   4 3f    x      It means that we need total 4 digits in ans   of which 3 should be after decimal   And f is the format specifier of double   x means the variable for which we want to find it   Worked for me

User · Answer

String format   1   2f   myDouble     String format automatically uses the default locale

[java] String.format() to format double in java

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