This class is used for precise calculations in Java. Below is an introduction to the methods for determining the size and equality of BigDecimal.

BigDecimal a = new BigDecimal(1.0);
BigDecimal b = BigDecimal.valueOf(1.000);

I. Comparison Method

int result = a.compareTo(b);

II. Comparison Results

• -1 less than
• 0 equal to
• 1 greater than

When making judgments, use the conditions greater than 0, less than 0, or equal to 0.