question: String formatTime ( int hour , int minute ) { String s = "" ; String t = Integer . toString ( hour ) ; if ( t . length ( ) == 2 ) { s = t + ":" ; } else if ( t . length ( ) == 1 ) { s = "0" + t + ":" ; } t = Integer . toString ( minute ) ; if ( t . length ( ) == 2 ) { s = s + t ; } else if ( t . length ( ) == 1 ) { s = s + "0" + t ; } if ( s . length ( ) != 5 ) { s = "00:00" ; } return s ; }
target:  Formats time to hh:mm given integer hour and minute