Answer by reflexdemon for How can I pad an integer with zeros on the left?

If you are on Java 15 and above,

var minutes = 5var strMinutes = "%02d".formatted(minutes)

where, 2 is the total number of digits you want to display(including zero).

Output: 05

This uses formatted method part of instance method on Strings called which does the same as the static String.format(str,x,y,z)