biginteger - What variable type can I use to hold huge numbers (30+ digits) in java? -

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is there large variable type can use in java store huge numbers (up around forty digits)?

long's maximum value 9223372036854775807, 19 digits -- not large enough.

i'm trying create calculator can handle large numbers, because nowadays can hold insufficient 10 digits or so, , want want accurate calculations numbers of larger magnitude

edit

thanks answers. can use biginteger big integers, limit being computer's memory (should sufficient). decimals, i'll use float ^e, @webdaldo suggested, or bigdecimal (similar biginteger), @kocko suggested.

you can use biginteger class.

biginteger bi1 = new biginteger("637824629384623845238423545642384");  biginteger bi2 = new biginteger("3039768898793547264523745379249934");   biginteger bigsum = bi1.add(bi2);  biginteger bigproduct = bi1.multiply(bi2);  system.out.println("sum : " + bigsum); system.out.println("product : " + bigproduct);

output:

sum : 3677593528178171109762168924892318

product : 1938839471287900434078965247064711159607977007048190357000119602656

i should mention bigdecimal, excellent amount calculations compare double.

bigdecimal bd = new bigdecimal("123234545.4767"); bigdecimal displayval = bd.setscale(2, roundingmode.half_even);  numberformat usdformat = numberformat.getcurrencyinstance(locale.us);         system.out.println(usdformat.format(displayval.doublevalue()));

output:

$123,234,545.48


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