BigDecimal to string

Question

I have a BigDecimal object and i want to convert it to string  The problem is that my value got fraction and i get a huge number  in length  and i only need the original number in string for example  for  BigDecimal bd   new BigDecimal 10 0001  System out println bd toString     System out println bd toPlainString       the output is   10 000099999999999766941982670687139034271240234375 10 000099999999999766941982670687139034271240234375   and i need the out put to be exactly the number 10 0001 in string

User · Accepted Answer

To get exactly 10 0001 you need to use the String constructor or valueOf  which constructs a BigDecimal based on the canonical representation of the double    BigDecimal bd   new BigDecimal  10 0001    System out println bd toString        prints 10 0001   or alternatively BigDecimal bd   BigDecimal valueOf 10 0001   System out println bd toString        prints 10 0001   The problem with new BigDecimal 10 0001  is that the argument is a double and it happens that doubles can t represent 10 0001 exactly  So 10 0001 is  transformed  to the closest possible double  which is 10 000099999999999766941982670687139034271240234375 and that s what your BigDecimal shows   For that reason  it rarely makes sense to use the double constructor   You can read more about it here  Moving decimal places over in a double

User · Answer

Convert BigDecimal number To String by using below method     public static String RemoveTrailingZeros BigDecimal tempDecimal        tempDecimal   tempDecimal stripTrailingZeros        String tempString   tempDecimal toPlainString        return tempString           Recall RemoveTrailingZeros BigDecimal output   new BigDecimal 0   String str   RemoveTrailingZeros output

User · Answer

By using below method you can convert java math BigDecimal to String       BigDecimal bigDecimal   new BigDecimal  10 0001       String bigDecimalString   String valueOf bigDecimal doubleValue        System out println  bigDecimal value in String    bigDecimalString     Output  bigDecimal value in String  10 0001

User · Answer

Your BigDecimal doesn t contain the number 10 0001  because you initialized it with a double  and the double didn t quite contain the number you thought it did   This is the whole point of BigDecimal    If you use the string-based constructor instead   BigDecimal bd   new BigDecimal  10 0001         then it will actually contain the number you expect

User · Answer

For better support different locales use this way   DecimalFormat df   new DecimalFormat    df setMaximumFractionDigits 2   df setMinimumFractionDigits 0   df setGroupingUsed false    df format bigDecimal     also you can customize it   DecimalFormat df   new DecimalFormat                 df format bigDecimal

User · Answer

If you just need to set precision quantity and round the value  the right way to do this is use it s own object for this    BigDecimal value   new BigDecimal  10 0001    value   value setScale 4  RoundingMode HALF UP   System out println value     the return should be  10 0001       One of the pillars of Oriented Object Programming  OOP  is  encapsulation   this pillar also says that an object should deal with it s own operations  like in this way

User · Answer

The BigDecimal can not be a double  you can use Int number  if you want to display exactly own number  you can use the String constructor of BigDecimal    like this   BigDecimal bd1   new BigDecimal  10 0001      now  you can display bd1 as 10 0001  So simple  GOOD LUCK

User · Answer

To archive the necessary result with double constructor you need to round the BigDecimal before convert it to String e g   new java math BigDecimal 10 0001  round new java math MathContext 6  java math RoundingMode HALF UP   toString    will print the  10 0001

[java] BigDecimal to string

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