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String strDouble = String. format("%. 2f", 1.23456); This will format the floating point number 1.23456 up-to 2 decimal places, because we have used two after decimal point in formatting instruction %.
The padStart() method is used on this string with the length parameter given as 2 and the string to be replaced with, given the character '0'. This will format any single digit number to 2 digits by prepending a '0' and leave 2 digit numbers as is.
format() method, which will let you do exactly what you want: String s = String. format("%02d", someNumber);
JavaScript Number Format Comma. To format a number with a comma means to separate the number by a comma at every 3rd digit like 123456789 => 1,234,567,890 to be more readable for system million, billion, trillion, etc. Another style of separating number is by placing comma at like 123456789 => 1,23,45,67,890.
You can use:
String.format("%02d", myNumber)
See also the javadocs
If you need to print the number you can use printf
System.out.printf("%02d", num);
You can use
String.format("%02d", num);
or
(num < 10 ? "0" : "") + num;
or
(""+(100+num)).substring(1);
You can use this:
NumberFormat formatter = new DecimalFormat("00");
String s = formatter.format(1); // ----> 01
The String class comes with the format abilities:
System.out.println(String.format("%02d", 5));
for full documentation, here is the doc
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