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Week number in Java

To get the week number for a date in Java, use the Calendar class. It has a constant called WEEK_OF_YEAR to get the calendar week number for a specific date.

Example

Get the current week number and print it.

Calendar calendar = new GregorianCalendar();
Date trialTime = new Date();   
calendar.setTime(trialTime);     
System.out.println("Week number:" + 
    calendar.get(Calendar.WEEK_OF_YEAR)); 

Output:

Week number:25