How to Handle Non-Terminating Decimal Expansions with BigDecimal?

Dealing with Non-Terminating Decimal Expansions and BigDecimal

When working with BigDecimal objects, it's important to be aware of the potential for non-terminating decimal expansions. Consider the following code:

BigDecimal a = new BigDecimal("1.6");
BigDecimal b = new BigDecimal("9.2");
a.divide(b)

This code attempts to divide the two BigDecimal objects, but instead raises the following exception:

java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.

This exception is thrown because the exact quotient of a and b has a non-terminating decimal expansion. By default, BigDecimal operations are exact, meaning they return the exact result even if it has an infinite decimal expansion. However, when the precision is set to 0 (as it is by default), the rounding mode is ignored and no rounding is performed.

To fix this exception, you need to specify a rounding mode and precision. For example:

a.divide(b, 2, RoundingMode.HALF_UP)

In this case, the division will be performed with a precision of 2 and the result will be rounded using the HALF_UP rounding mode. This will result in a finite decimal expansion.

For more information on handling non-terminating decimal expansions with BigDecimal, refer to the Java documentation or relevant resources such as blog posts and tutorials.

The above is the detailed content of How to Handle Non-Terminating Decimal Expansions with BigDecimal?. For more information, please follow other related articles on the PHP Chinese website!