CODEWITHSUNDEEP
javaspringdatesimpledateformat
suraj gaikwad
suraj gaikwad

Reputation: 21

How to compare one month-with-day to another in Java?

I want to compare two date one is to take as current date and another one is static date that is from local variable. I want to compare date and month only i have written one program can anyone confirm is it right or not ?

String str="27/09";
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd/MM");
        LocalDateTime now = LocalDateTime.now();
        String date1=dtf.format(now);
        
        System.out.println("fist date Date 1\t"+date1);
        SimpleDateFormat sdformat = new SimpleDateFormat("dd/MM");
        Date d1 = sdformat.parse(str);
        String date2=sdformat.format(d1);
        System.out.println("second date Date2 \t"+date2);
        
        int result = date1.compareTo(date2);

        if (result < 0) {
            System.out.println("Date1 is before Date2");
        }```

LOCALDATE>STATICVARIABLE DATE this is condition and want to compare date and month only.

Upvotes: 1

Views: 879

Answers (1)

Basil Bourque
Basil Bourque

Reputation: 339845

tl;dr

MonthDay
.of( Month.OCTOBER , 1 ) 
.isAfter( 
    MonthDay
    .parse(
        "27/09" , 
        DateTimeFormatter.ofPattern( "dd/MM" ) 
    )
)

Run this code at Ideone.com.

true

java.time.MonthDay

You are using terrible date-time classes that were years ago supplanted by the modern java.time classes defined in JSR 310.

For a day of month, use MonthDay class.

MonthDay md = MonthDay.of( 9 , 27 ) ;

For exchanging date-time values as text, ask the publisher of your data to use only standard ISO 8601 formats. For month-day, that format is --MM-DD.

String output = md.toString() ;

--09-27

If you must accept non-standard input, define a formatting pattern with DateTimeFormatter class.

DateTimeFormatter f = DateTimeFormatter.ofPattern( "dd/MM" ) ;

Parse your input.

String input = "27/09" ;
MonthDay sept27 = MonthDay.parse( input , f ) ;

sept27.toString(): --09-27

See this code run live at Ideone.com.

You can compare MonthDay objects by using their methods isBefore, equals, and isAfter.

If you want the current year-month, you need to a time zone. For any given moment, the date varies around the globe by time zone. So near the start/end of a month, it might be “next” month in Tokyo Japan while simultaneously “previous” month in Toledo Ohio US.

ZoneId z = ZoneId.of( "Pacific/Auckland" ) ;
MonthDay currentYearMonth = MonthDay.now( z ) ;

Upvotes: 6

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