Double formatting question for printf in Java

Question

s is a string in printf  and  d is a decimal I thought   yet when putting in   writer printf   d dollars is the balance of  s r n   bal  nm       an exception is thrown telling me that  d    lang double  Ideas

User · Accepted Answer

d is for integers use  f instead  it works for both float and double types   double d   1 2  float f   1 2f  System out printf   f  f  d f      prints 1 200000 1 200000

User · Answer

Yes   d is for decimal  integer   double expect  f  But simply using  f will default to up to precision 6  To print all of the precision digits for a double  you can pass it via string as   System out printf   s  r n  String valueOf d      or  System out printf   s  r n  Double toString d      This is what println do by default   System out println d      and terminates the line

User · Answer

Yes   d means decimal  but it means decimal number system  not decimal point   Further  as a complement to the former post  you can also control the number of decimal points to show  Try this   System out printf    2f   1f  d f      prints 1 20 1 2   For more please refer to the API docs

User · Answer

Following is the list of conversion characters that you may use in the printf    d     for signed decimal integer   f     for the floating point   o     octal number   c     for a character   s     a string   i     use for integer base 10   u     for unsigned decimal number   x     hexadecimal number         for writing    percentage    n     for new line    n

[java] Double % formatting question for printf in Java

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