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How do I represent numbers in the format
001 = 1
002 = 2
003 = 3
010 = 10
020 = 20
The number of digits is always 3.
649
We can use DecimalFormat("0.00") to ensure the number always round to 2 decimal places. For DecimalFormat , the default rounding mode is RoundingMode. HALF_EVEN , and we can use setRoundingMode(RoundingMode) to set a specified rounding mode.
Just use %. 2f as the format specifier. This will make the Java printf format a double to two decimal places.
The %. 2f syntax tells Java to return your variable (value) with 2 decimal places (. 2) in decimal representation of a floating-point number (f) from the start of the format specifier (%).
If you want to output integers such that they always have leading zeros, use String.format with a zero before the number of digits in the format string, for example:
int i = 3;
String s = String.format("%03d", i);
System.out.println(s);
Gives the output:
003
Integer.valueOf("020") is sufficient for your purpose. It will give you 20 as a result. After that you can use it as Integer, int or String.
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