You can use setScale() to reduce the number of fractional digits to zero. Assuming value holds the value to be rounded: BigDecimal scaled = value.setScale(0, RoundingMode.HALF_UP); System.out.println(value + ” -> ” + scaled); Using round() is a bit more involved as it requires you to specify the number of digits to be retained. In your … Read more
A BigDecimal is defined by two values: an arbitrary precision integer and a 32-bit integer scale. The value of the BigDecimal is defined to be . Precision: The precision is the number of digits in the unscaled value. For instance, for the number 123.45, the precision returned is 5. So, precision indicates the length of … Read more
Check out setParseBigDecimal in DecimalFormat. With this setter, parse will return a BigDecimal for you.
public static String currencyFormat(BigDecimal n) { return NumberFormat.getCurrencyInstance().format(n); } It will use your JVM’s current default Locale to choose your currency symbol. Or you can specify a Locale. NumberFormat.getInstance(Locale.US) For more info, see NumberFormat class.
Those are two separate questions: “What should I use for BigDecimal?” and “What do I do in general?” For BigDecimal: this is a bit tricky, because they don’t do the same thing. BigDecimal.valueOf(double) will use the canonical String representation of the double value passed in to instantiate the BigDecimal object. In other words: The value … Read more
Is it necessary to use a BigDecimal? If you don’t have to, I’d use an int or long for seconds, and it would simplify things a little bit: hours = totalSecs / 3600; minutes = (totalSecs % 3600) / 60; seconds = totalSecs % 60; timeString = String.format(“%02d:%02d:%02d”, hours, minutes, seconds); You might want to … Read more
You would call myBigDecimal.intValueExact() (or just intValue()) and it will even throw an exception if you would lose information. That returns an int but autoboxing takes care of that.
To be short: firstBigDecimal.compareTo(secondBigDecimal) < 0 // “<” firstBigDecimal.compareTo(secondBigDecimal) > 0 // “>” firstBigDecimal.compareTo(secondBigDecimal) == 0 // “==” firstBigDecimal.compareTo(secondBigDecimal) >= 0 // “>=”
You can use format function with “,”; int no = 124750; String str = String.format(“%,d”, no); //str = 124,750 “,” includes locale-specific grouping characters. docs
One important point that is alluded to but not directly addressed is the difference between “precision” and “scale” and how they are used in the two statements. “precision” is the total number of significant digits in a number. “scale” is the number of digits to the right of the decimal point. The MathContext constructor only … Read more