Converting date from string to int in Java

Question

I want to convert a string of date value(January 27) to 01/27. I know I can do this using the SimpleDateFormat class or creating a bunch of if-else statements, but I was wondering if there was another way to convert it without using the SimpleDateFormat class or creating if-else statements.

Answer 1

tl;dr

MonthDay
.parse(
    "January 27" ,
    DateTimeFormatter.ofPattern( "MMMM d").withLocale( Locale.US )
)
.format(
    DateTimeFormatter.ofPattern( "MM/dd") 
)

MonthDay

There is a class for that: MonthDay .

Parse a standard ISO 8601 string.

String input = "--01-23" ;
MonthDay monthDay = MonthDay.parse( input ) ;

Generate text in standard format.

String output = MonthDay.toString() ;

For your custom format, define a custom formatting pattern with DateTimeFormatter class.

MonthDay md = MonthDay.parse( "--01-23" ) ;
DateTimeFormatter f = DateTimeFormatter.ofPattern( "MM/dd") ;
String output = md.format( f ) ;

01/23

See this code run live at IdeOne.com .