get 2 digit places

[Sophia Choi]

how can I can digit places ? e.g. 12.34534 -> 12.35 or 6.3333-> 6.33
now, I am using the formula as following,
result_arr[i] = (float) Math.floor( (float) tot_weight / respondents * 10 + 0.5) /10 ;
Any other suggestions?
Thanks

[Barry Burd]

Try this:
import java.text.NumberFormat;
...
NumberFormat numFormat =
NumberFormat.getNumberInstance();
numFormat.setMinimumFractionDigits(2);
numFormat.setMaximumFractionDigits(2);

System.out.print(numFormat.format(12.34567);