[Java] java.math.BigDecimal 활용 Discount, Tax

public class Calc2 {
  public static void main(String args[]) {
    BigDecimal amount = new BigDecimal("100.05");
    BigDecimal discountPercent = new BigDecimal("0.10");
    BigDecimal discount = amount.multiply(discountPercent);
    discount = discount.setScale(2, RoundingMode.HALF_UP);
    BigDecimal total = amount.subtract(discount);
    total = total.setScale(2, RoundingMode.HALF_UP);
    BigDecimal taxPercent = new BigDecimal("0.05");
    BigDecimal tax = total.multiply(taxPercent);
    tax = tax.setScale(2, RoundingMode.HALF_UP);
    BigDecimal taxedTotal = total.add(tax);
    taxedTotal = taxedTotal.setScale(2, RoundingMode.HALF_UP);
    System.out.println("Subtotal : " + amount);
    System.out.println("Discount : " + discount);
    System.out.println("Total : " + total);
    System.out.println("Tax : " + tax);
    System.out.println("Tax+Total: " + taxedTotal);
  }
}



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http://hangaebal.blogspot.kr/2014/06/javamathbigdecimal-discount-tax.html