java - Adding zeros in front of double -


i have double

ex: -2.34

i want add 9 zeros in front of make length fixed 10 digits.

result: -0000000002.34

i tried:

string formatted = string.format("%010d", number);

but can pass double string format function?

what efficient method this?

the easiest way create decimalformat object, supplying pattern yourself. 0 characters indicate digit should printed here, if unnecessary.

decimalformat df = new decimalformat("0000000000.00"); string formatted = df.format(-2.34);

outputting:

-0000000002.34

with string.format, can supply total length decimal characters used. use 14 total length, account 10 "whole" digits, negative sign, decimal point, , 2 decimal digits.

string.format("%014.2f", test)

the output is:

-0000000002.34

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