How to print a float with 2 decimal places in Java

Question

Can I do it with System out print

User · Accepted Answer

You can use the printf method  like so   System out printf    2f   val     In short  the   2f syntax tells Java to return your variable  val  with 2 decimal places   2  in decimal representation of a floating-point number  f  from the start of the format specifier       There are other conversion characters you can use besides f    d  decimal integer o  octal integer e  floating-point in scientific notation

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float floatValue 22 34555f  System out print String format    2f   floatValue      Output is 22 35  If you need 3 decimal points change it to    3f

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double d   1 234567  DecimalFormat df   new DecimalFormat          System out print df format d

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Many people have mentioned DecimalFormat   But you can also use printf if you have a recent version of Java   System out printf   1 2f   3 14159D     See the docs on the Formatter for more information about the printf format string

User · Answer

Just do String str   System out printf    2f   val  replace            if you want to ensure that independently of the Locale of the user  you will always get   display a     as decimal separator  This is a must if you don t want to make your program crash if you later do some kind of conversion like float f   Float parseFloat str

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I would suggest using String format   if you need the value as a String in your code     For example  you can use String format   in the following way   float myFloat   2 001f   String formattedString   String format    02f   myFloat

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One issue that had me for an hour or more  on DecimalFormat- It handles double and float inputs differently  Even change of RoundingMode did not help  I am no expert but thought it may help someone like me  Ended up using Math round instead   See below       DecimalFormat df   new DecimalFormat              double d   0 7750      System out println   Double 0 7750 - gt     Double valueOf df format d         float f   0 7750f      System out println   Float 0 7750f - gt    Float valueOf df format f            change the RoundingMode     df setRoundingMode RoundingMode HALF UP       System out println   Rounding Up Double 0 7750 - gt     Double valueOf df format d         System out println   Rounding Up Float 0 7750f - gt     Float valueOf df format f       Output   Double 0 7750 - gt  0 78 Float 0 7750f - gt  0 77  Rounding Up Double 0 7750 - gt  0 78 Rounding Up Float 0 7750f - gt  0 77

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You may use this quick codes below that changed itself at the end  Add how many zeros as refers to after the point  float y1   0 123456789  DecimalFormat df   new DecimalFormat    00      y1   Float valueOf df format y1         The variable y1 was equals to 0 123456789 before  After the code it turns into 0 12 only

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To print a float up to 2 decimal places in Java      float f    float 11 3      System out print String format  quot   2f quot  f      OUTPUT  3 67   gt  use   3f for up to three decimal places

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OK - str to float   package test   import java text DecimalFormat   public class TestPtz     public static void main String   args        String preset0    0 09 0 20 0 09 0 07       String   thisto   preset0 split               float a    Float valueOf thisto 0    floatValue        System out println   Original       a          a    float   a   0 01           Part 1 - for display   debug     System out printf   Local     2f  n   a          Part 2 - when value requires to be send as it is     DecimalFormat df   new DecimalFormat        df setMinimumFractionDigits 2       df setMaximumFractionDigits 2       System out println   Remote       df format a             Output   run   Original   0 09  Local   0 10   Remote   0 10 BUILD SUCCESSFUL  total time  0 seconds

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small simple program for demonstration   import java io    import java util Scanner   public class twovalues        public static void main String args               float a b          Scanner sc new Scanner System in           System out println  Enter Values For Calculation             a sc nextFloat            b sc nextFloat             float c a b          System out printf    2f  c

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Look at DecimalFormat  Here is an example from the tutorial     DecimalFormat myFormatter   new DecimalFormat pattern     String output   myFormatter format value     System out println value          pattern          output     If you choose a pattern like           you will get two decimal places  and I think that the values are rounded up  You will want to look at the link to get the exact format you want  e g   whether you want trailing zeros

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A simple trick is to generate a shorter version of your variable  by multiplying it with e g  100  rounding it and dividing it by 100 0 again  This way you generate a variable  with 2  decimal places   double new variable   Math round old variable 100    100 0    This  cheap trick  was always good enough for me  and works in any language  I am not a Java person  just learning it

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Below is code how you can display an output of float data with 2 decimal places in Java   float ratingValue   52 98929821f   DecimalFormat decimalFormat   new DecimalFormat          float twoDigitsFR   Float valueOf decimalFormat format ratingValue       output is 52 98

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float f   102 236569f   DecimalFormat decimalFormat   new DecimalFormat          float twoDigitsF   Float valueOf decimalFormat format f       output is 102 24

User · Answer

Try this -  private static String getDecimalFormat double value         String getValue   String valueOf value  split        1          if  getValue length      1              return String valueOf value  split        0                         getValue substring 0  1                     String format   0  1  d   0            else             return String valueOf value  split        0                     getValue substring 0  2

User · Answer

You can use DecimalFormat  One way to use it   DecimalFormat df   new DecimalFormat    df setMaximumFractionDigits 2   System out println df format decimalNumber      Another one is to construct it using the      format   I find all formatting options less readable than calling the formatting methods  but that s a matter of preference

[java] How to print a float with 2 decimal places in Java?

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