Convert string to BigDecimal in java

Question

I am reading a currency from XML into Java  String currency    quot 135 69 quot    When I convert this to BigDecimal I get   System out println new BigDecimal 135 69     Output  135 68999999999999772626324556767940521240234375   Why is it that it outputs this many numbers  How can I avoid this  All I want is for it to output 135 69

User · Answer

Spring Framework provides an excellent utils class for achieving this  Util class   NumberUtils String to BigDecimal conversion - NumberUtils parseNumber  quot 135 00 quot   BigDecimal class

User · Answer

The BigDecimal double  constructor can have unpredictable behaviors  It is preferable to use BigDecimal String  or BigDecimal valueOf double   System out println new BigDecimal 135 69      135 68999999999999772626324556767940521240234375 System out println new BigDecimal  quot 135 69 quot        135 69 System out println BigDecimal valueOf 135 69       135 69  The documentation for BigDecimal double  explains in detail    The results of this constructor can be somewhat unpredictable  One might assume that writing new BigDecimal 0 1  in Java creates a BigDecimal which is exactly equal to 0 1  an unscaled value of 1  with a scale of 1   but it is actually equal to 0 1000000000000000055511151231257827021181583404541015625  This is because 0 1 cannot be represented exactly as a double  or  for that matter  as a binary fraction of any finite length   Thus  the value that is being passed in to the constructor is not exactly equal to 0 1  appearances notwithstanding  The String constructor  on the other hand  is perfectly predictable  writing new BigDecimal  quot 0 1 quot   creates a BigDecimal which is exactly equal to 0 1  as one would expect  Therefore  it is generally recommended that the String constructor be used in preference to this one  When a double must be used as a source for a BigDecimal  note that this constructor provides an exact conversion  it does not give the same result as converting the double to a String using the Double toString double  method and then using the BigDecimal String  constructor  To get that result  use the static valueOf double  method

User · Answer

You are storing 135 69 as String in currency  But instead of passing variable currency  you are again passing 135 69 double value  into new BigDecimal    So you are seeing a lot of numbers in the output  If you pass the currency variable  your output will be 135 69

User · Answer

Hi Guys you cant convert directly string to bigdecimal   you need to first convert it into long after that u will  convert big decimal     String currency    135 69    Long rate1 Long valueOf  currency                 System out println BigDecimal valueOf rate1

User · Answer

BigDecimal b   BigDecimal valueOf d    import java math      public class Test         public static void main String   args                      Creating a Double Object          Double d   new Double  785 254                  Assigning the bigdecimal value of ln to b          BigDecimal b   BigDecimal valueOf d                Displaying BigDecimal value          System out println  The Converted BigDecimal value is      b

User · Answer

May I add something  If you are using currency you should use Scale 2   and you should probably figure out a round method

User · Answer

String currency    135 69   System out println new BigDecimal currency       will print 135 69

[java] Convert string to BigDecimal in java

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