decimal4j

decimal4j provides fixed-point arithmetic using unscaled long values, supporting between 0 and 18 decimal places. The scale is determined by the specific type used (e.g., Decimal2f for 2 decimal places, Decimal18f for 18).

Key Features

• Scale Management: The result of an operation usually inherits the scale of the primary operand.
• Rounding: Supports all java.math.RoundingMode options. The default rounding mode is HALF_UP.
• Overflow: Provides options to throw an exception when arithmetic overflow occurs.
• Efficiency: Offers MutableDecimal for chained operations and a DecimalArithmetic API for zero-garbage computations using unscaled long values.

// Example: Interest Calculation
Decimal2f principal = Decimal2f.valueOf(9500);
Decimal3f rate = Decimal3f.valueOf(0.067);
Decimal2f time = Decimal2f.valueOf(1).divide(4);
Decimal2f interest = principal.multiplyBy(rate.multiplyExact(time));
System.out.println("First quarter interest: $" + interest);

// Example: Using specific RoundingMode
Decimal2f down = radius.multiplyBy(PI.multiply(2), RoundingMode.DOWN);