java help 2

Question

public String toMilitary() {
return String.format("%02d:%02d:%02d", getHour(), getMinute(), getSecond());
what does code %02d mean?

Answer 1

% means it is to be a literal
0 is the padding flag (result will be 0 padded)
2 is the width of digits to be output
d means the type passed in is a decimal (base 10) integer

https://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html