BigDecimal - Numeric type

Define BigDecimal: BigDecimal b

Example:

BigDecimal b = 0.01

Static methods of BigDecimal type:

• BigDecimal.of(<String value>)
• BigDecimal.of(<Number value>)

Decimal rounding:

• b.setScale(decimal places, BigDecimal.ROUND_HALF_UP) Round half up
• b.setScale(decimal places, BigDecimal.ROUND_HALF_DOWN) ROUND_UP when discarded part >5, otherwise ROUND_DOWN
• b.setScale(decimal places, BigDecimal.ROUND_UP) Always round up (except 0) regardless of following digits
• b.setScale(decimal places, BigDecimal.ROUND_DOWN) Keep specified digits and truncate all following digits

Example:

BigDecimal a = 3.435
BigDecimal b = a.setScale(2, BigDecimal.ROUND_UP)
BigDecimal c = a.setScale(2, BigDecimal.ROUND_DOWN)
BigDecimal d = a.setScale(2, BigDecimal.ROUND_HALF_UP)
BigDecimal e = a.setScale(2, BigDecimal.ROUND_HALF_DOWN)

log.info(b) //3.44
log.info(c) //3.43
log.info(d) //3.44
log.info(e) //3.43