formatting double value

[Sandeep Sirsekar]

hi all
can someone please help me out ,
i want to parse double to precision length of 4 digit after '.'

ive tried

System.out.format("%1$f.4", 12.3456789123456789);
System.out.format("%1$f2.4", 12.3456789123456789);

so can anyone tell me what to do to get

12.3456

thanks in advance.

[Rob Spoor]

Use %.4f or %1.4f
The .4 indicates the number of decimals.

[Campbell Ritchie]

Rob is correct; the problem was that you have the .4 bit after the s.

But you will never get 12.3456 from that number. It will be rounded to 12.3457. You would have to round down, possibly using methods of the BigDecimal and MathContext classes.