Java has BigDecimal and BigInt which make possible working with big numbers.

The drawbacks of using these classes are performance (maybe it will be ok when running on future CPUs) and ease of use, since Java doesn't let the programmer overload operators you have to write stuff like:

BigDecimal b1 = new BigDecimal("100.04");
BigDecimal b2 = new BigDecimal("0.33");
BigDecimal result = b1.multiply(b2);