How to remove decimal values from a value of type double in Java

Question

I am invoking a method called  calculateStampDuty   which will return the amount of stamp duty to be paid on a property  The percentage calculation works fine  and returns the correct value of  15000 0   However  I want to display the value to the front end user as just  15000   so just want to remove the decimal and any preceding values thereafter  How can this be done  My code is below   float HouseValue   150000  double percentageValue   percentageValue   calculateStampDuty 10  HouseValue    private double calculateStampDuty int PercentageIn  double HouseValueIn       double test   PercentageIn   HouseValueIn   100      return test      I have tried the following    Creating a new string which will convert the double value to a string  as per below   String newValue   percentageValue toString    I have tried using the  valueOf  method on the String object  as per below   String total2   String valueOf percentageValue     However  I just cannot get a value with no decimal places  Does anyone know in this example how you would get  15000  instead of  15000 0    Thanks

User · Answer

declare a double value and convert to long convert to string and formated to float the double value finally replace all the value like 123456789 0000 to 123456789 Double value   double value   Long longValue   value longValue     String strCellValue1   new String longValue toString   format  quot  f quot  value  replaceAll  quot     0   quot    quot  quot

User · Answer

I would try this   String numWihoutDecimal   String valueOf percentageValue  split        0     I ve tested this and it works so then it s just convert from this string to whatever type of number or whatever variable you want  You could do something like this   int num   Integer parseInt String valueOf percentageValue  split        0

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Try this you will get a string from the format method   DecimalFormat df   new DecimalFormat    0     df format  Math round doubleValue   100 0    100 0

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Double i   Double parseDouble  String with double value     Log i tag   display double     i    try       NumberFormat nf   NumberFormat getInstance        nf setMaximumFractionDigits 0      set as you need     String myStringmax   nf format i        String result   myStringmax replaceAll   -                   Double i   Double parseDouble result        int max   Integer parseInt result     catch  Exception e        System out println  ex     e

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Double d   1000d  System out println  Normal value    d   System out println  Without decimal points    d longValue

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You can convert the double value into a int value  int x    int  y where y is your double variable  Then  printing x does not give decimal places  15000 instead of 15000 0

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Use     Math Round double    I have used it myself   It actually rounds off the decimal places     d   19 82  ans   Math round d   System out println ans      Output   20   d   19 33  ans   Math round d   System out println ans      Output   19    Hope it Helps  -

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I did this to remove the decimal places from the double value  new DecimalFormat      format 100 0     The output of the above is      100

User · Answer

String truncatedValue   String format   f   percentageValue  split        0   solves the purpose  The problem is two fold-   To retain the integral  mathematical integer  part of the double  Hence can t typecast  int  percentageValue Truncate  and not round  the decimal part  Hence can t use String format    0f   percentageValue  or new java text DecimalFormat      format percentageValue  as both of these round the decimal part

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Alternatively  you can use the method int integerValue    int Math round double a

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Try   String newValue   String format   d    int d

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the simple way to remove new java text DecimalFormat  quot   quot   format value

User · Answer

public class RemoveDecimalPoint            public static void main String   args               System out println  quot  quot   removePoint 250022005 60                        public static String  removePoint double number                        long x    long  number              return x  quot  quot

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This should do the trick   System out println percentageValue split       0

User · Answer

Nice and simple  Add this snippet in whatever you re outputting to   String format    0f   percentageValue

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You could use  String newValue   Integer toString  int percentageValue     Or  String newValue   Double toString Math floor percentageValue

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With a cast  You re basically telling the compiler  I know that I ll lose information with this  but it s okay   And then you convert the casted integer into a string to display it   String newValue     int  percentageValue  toString

User · Answer

You can use DecimalFormat  but please also note that it is not a good idea to use double in these situations  rather use BigDecimal

User · Answer

The solution is by using DecimalFormat class  This class provides a lot of functionality to format a number  To get a double value as string with no decimals use the code below     DecimalFormat decimalFormat   new DecimalFormat       decimalFormat setGroupingUsed false   decimalFormat setDecimalSeparatorAlwaysShown false    String year   decimalFormat format 32024 2345D

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You can convert double float variables to integer in a single line of code using explicit type casting   float x   3 05 int y    int  x  System out println y     The output will be 3

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Type casting to integer may create problem but even long type can not hold every bit of double after narrowing down to decimal places  If you know your values will never exceed Long MAX VALUE value  this might be a clean solution   So use the following with the above known risk   double mValue   1234567890 123456  long mStrippedValue   new Double mValue  longValue

[java] How to remove decimal values from a value of type 'double' in Java

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