How to find day of the week when entered a date (mm/dd/yyyy) in JAVA?

In this Java tutorial, we gonna learn how to find day of a given date in Java easily. I will show you an easy example so that you can understand it easily.

HOW TO FIND DAY OF A GIVEN DATE IN JAVA

To find the day of a given number in Java, the date is given as input, we will use Calendar class, which is an abstract class that allows us to use the methods for converting between a specific instant in time and a set of calendar fields such as:

• Year
• Month
• Day of Month
• Hour
• Day of the next week and so on

If you are not familiar with classes concept you can read the following article:

Concept Of Class and Object in Java With Examples

For this, let’s take an example

The yellow highlighted date will be our input date.

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Now, if we take this as an input:

05 10 2018

Then the output for this input according to the given problem is

THURSDAY

Curious to know how to do that?

Now, let’s see the code:

//JAVA7

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class Solution {
        public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String month = in.next();
        String day = in.next();
        String year = in.next();
        
        Calendar c = Calendar.getInstance(); 
        c.set(Integer.parseInt(year), Integer.parseInt(month)-1,Integer.parseInt(day));
String dayOfWeek = getDayOfWeek(c.get(Calendar.DAY_OF_WEEK));
System.out.println(dayOfWeek.toUpperCase() );

    }
    
    private static String getDayOfWeek(int value){
    String day = "";
    switch(value){
    case 1:
        day="Sunday";
        break;
    case 2:
        day="Monday";
        break;
    case 3:
        day="Tuesday";
        break;
    case 4:
        day="Wednesday";
        break;
    case 5:
        day="Thursday";
        break;
    case 6:
        day="Friday";
        break;
    case 7:
        day="Saturday";
        break;
    }
    return day;
    }    
}

Input

01 23 2018

Output

TUESDAY

I hope this tutorial was helpful to you. Feel free to comment and share.

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