DayOfWeek valueOf() method in Java with Examples

The valueOf() method of java.time.DayOfWeek is an in-built function in Java which takes a string and returns an instance of DayOfWeek corresponding to the string. The string must match exactly to the identifier used to declare a day-of-week constant in this type. Extraneous white space characters are not permitted.

Method Declaration:

 public static DayOfWeek valueOf(String name)

Syntax:



 DayOfWeek dayOfWeekObject = DayOfWeek.valueOf(String name)

Parameters: This method takes name as parameter where:

  • name – is the string which is the name of the day-of-week.
  • dayOfWeekObject – is an instance of DayOfWeek.
  • Return Value: The function returns an instance of DayOfWeek corresponding to the name string

    Below programs illustrate the above method:
    Program 1:

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    // Java Program Demonstrate valueOf()
    // method of DayOfWeek
      
    import java.time.*;
      
    class DayOfWeekExample {
        public static void main(String[] args)
        {
            // Initializing a DayOfWeek instance
            DayOfWeek dayOfWeek
                = DayOfWeek.valueOf("MONDAY");
      
            // Printing the day-of-week
            System.out.println(dayOfWeek.name());
        }
    }

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    Output:

    MONDAY
    

    Program 2:

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    // Java Program Demonstrate valueOf()
    // method of DayOfWeek
      
    import java.time.*;
      
    class DayOfWeekExample {
        public static void main(String[] args)
        {
            // Initializing a DayOfWeek instance
            DayOfWeek dayOfWeek
                = DayOfWeek.valueOf("SATURDAY");
      
            // Printing the day-of-week
            System.out.println(dayOfWeek.name());
        }
    }

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    Output:

    SATURDAY
    

    Reference: https://docs.oracle.com/javase/8/docs/api/java/time/DayOfWeek.html#valueOf-java.lang.String-



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