How Can I Determine the Day of the Week for a Given Date in Java?

Determining the Day of the Week from a Date

Given a specific date, determining the corresponding day of the week is a common task in programming. This question explores several approaches to retrieve the desired information.

Retrieving the Full Day of the Week

To obtain the full day of the week as a string (e.g., "Tue"), you can utilize the following methods:

• Utilizing java.util.Calendar:

Calendar c = Calendar.getInstance();
c.setTime(yourDate);
int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);

• Reformatting the Date String:

String dayOfWeek = new SimpleDateFormat("EE").format(date);

Retrieving the Day Ordinal

If you prefer to retrieve the day ordinal (e.g., 3 for Tuesday), you can employ the following technique:

int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);

Handling Input Date Strings

In the event that your input is provided as a string rather than a Date object, you can parse it using SimpleDateFormat:

Date date = new SimpleDateFormat("dd/M/yyyy").parse(dateString);

Additional Libraries

• joda-time: Using DateTime, you can call dateTime.dayOfWeek().
• java.time (Java 8 ): Instead of joda-time, consider using the java.time package to determine day of week.

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