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Fixed, Floating, and Exact Computation with Java's Bigdecimal

By Mike Cowlishaw and Joshua Bloch and Joseph D. Darcy, July 01, 2004

Features in the J2SE 1.5 BigDecimal class make calculations easy.
July, 2004: Fixed, Floating, and Exact Computation with Java's BigDecimal

Type Exponent Range Precision
float 2-149 to 2127 ~= 10-45 to 1038 24 bits ~= 6 to 9 decimal digits
double 2-1074 to 21023 ~= 10-324 to 10308 53 bits ~= 15 to 17 decimal digits
BigDecimal 10-2147483647 to 102147483648 1 to billions of decimal digits

Table 2: Properties of numeric types.

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