[Java] BigDecimal implementation code for addition, subtraction, multiplication and division

java. math. BigDecimal

There are four ways to make BigDecimal. Let me take a look at two of them first:

The first: BigDecimal (double VAL)

Translates a double into a BigDecimal.

Second: BigDecimal (string VAL)

Translates the String repre sentation of a BigDecimal into a BigDecimal.

To use BigDecimal, you need to use string to generate. To perform an addition operation, you need to convert two floating-point numbers into string, and then generate BigDecimal. Call the add method on one of them, pass in the other as a parameter, and then convert the operation result (BigDecimal) into floating-point numbers.

Tool class: arith

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