Fetching only month from the date and giving month name in java

Question

I have fetched the date month and year from the text file so now i want to fetch only month part and I have to get month name I have done like this

String s;
String keyword = "Facture du";

while ((s = br.readLine()) != null) {
    if (s.contains(keyword)) {
    //  s= s.replaceAll("\\D+","");

        System.out.println(s);
    }
}

Actual Output: Facture du 28/05/2018
Expected Output: only Month name

You can use `split("/")` to break it into an array, get the month and then use a `switch` to determine the name — Ayrton, Feb 13 '19 at 13:21
Currently you just print the read line out. You need to parse the Date from the String and get the month name from that and just print this out. — CodeMatrix, Feb 13 '19 at 13:21
A solution would be to parse the date text into a [LocalDateTime](https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html) object and then format the date to pattern `MM`. On [How to parse/format dates with LocalDateTime? (Java 8)](https://stackoverflow.com/questions/22463062/how-to-parse-format-dates-with-localdatetime-java-8) thread there are some details about how this can be done — , Feb 13 '19 at 13:45

Nicholas K · Answer 1 · 2019-02-13T18:10:50.267

2

Using java-8's LocalDate you can just do :

String strDate = "28/05/2018";
DateTimeFormatter format = DateTimeFormatter.ofPattern("dd/MM/yyyy");
LocalDate localDate = LocalDate.parse(strDate, format);
System.out.println(localDate.getMonth());

which gives the output as MAY

edited Feb 13 '19 at 18:10

answered Feb 13 '19 at 14:17

Nicholas K

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Question asked for month name. Tip: `Month::getDisplayName`. – Basil Bourque Feb 13 '19 at 17:38

Ole V.V. · Answer 2 · 2019-02-14T09:31:48.690

Nicholas K already provided an answer nicely showing the use of java.time. I just wanted to add that java.time can do a bit more than shown there.

    DateTimeFormatter factureLineFormatter
            = DateTimeFormatter.ofPattern("'Facture du' dd/MM/uuuu");

    String keyword = "Facture du";
    String s = "Facture du 28/05/2018";
    if (s.contains(keyword)) {
        LocalDate date = LocalDate.parse(s, factureLineFormatter);
        Month month = date.getMonth();  // Extract a `Month` enum object.
        String output = 
            month.getDisplayName(       // Get localized name of month.
                TextStyle.FULL,         // How long or abbreviated should the month name be.
                Locale.FRENCH)          // `Locale` determines the human language used in translation, and the cultural norms used in abbreviation, punctuation, and capitalization.
        ;
        System.out.println(output);
    }

Output:

mai

I am parsing the entire line immediately by adding the literal text in quotes in the format pattern string. I am printing the localized month name — here in French, but you can choose another language. You may also choose to have it abbreviated if you prefer.

Edit: Basil Bourque has kindly edited my code spelling out in comments what each method and argument does. This makes the code look long, but is great for the explanation in a Stack Overflow answer. In production code you would probably use a one-liner:

        System.out.println(date.getMonth().getDisplayName(TextStyle.FULL, Locale.FRENCH));

T A · Accepted Answer · 2019-02-13T14:44:56.960

0

You could use Calendar from the java.utils package:

    SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
    Date date = format.parse("28/05/2018");
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    System.out.println(cal.getDisplayName(Calendar.MONTH, Calendar.LONG_FORMAT, Locale.FRENCH));

I'm assuming you speak french and want to display the french name. Otherwise you will need to adjust the Locale parameter.

For your date this code will output "mai".

edited Feb 13 '19 at 14:44

answered Feb 13 '19 at 14:18

T A

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These terrible date-time classes were supplanted years ago by the *java.time* classes. Suggesting their use in 2019 is poor advice. – Basil Bourque Feb 13 '19 at 17:36
1

Please don’t teach the young ones to use the long outdated and notoriously troublesome `SimpleDateFormat` class. At least not as the first option. And not without any reservation. Today we have so much better in [`java.time`, the modern Java date and time API](https://docs.oracle.com/javase/tutorial/datetime/) and its `DateTimeFormatter`. – Ole V.V. Feb 13 '19 at 18:15

Fetching only month from the date and giving month name in java

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