How do I print the day name from date input separated by spaces in java ?

Question

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You are given a date. Your task is to find what the day is on that date.

Input Format

A single line of input containing the space separated month, day and year, respectively, in MM DD YYYY format.

Output Format

Output the correct day in capital letters.

My code:

C#

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);
        int month = in.nextInt();
        int day = in.nextInt();
        int year = in.nextInt();
        Calendar cal = Calendar.getInstance();
        
        cal.set(month,day,year);
        switch(cal.get(cal.DAY_OF_WEEK))
            {
            case 1:System.out.println("SUNDAY");
            break;
            case 2:System.out.println("MONDAY");
            break;
            case 3:System.out.println("TUESDAY");
            break;
            case 4:System.out.println("WEDNESDAY");
            break;
            case 5:System.out.println("THURSDAY");
            break;
            case 6:System.out.println("FRIDAY");
            break;
            case 7:System.out.println("SATURDAY");
            break;
        }
    }
}

What I have tried:

The above code yields success only for few test cases and fails for major test cases.
Can someone help me notifying where am I making a mistake ?

Posted 27-Sep-16 20:33pm

GaneshRfromSpace

Updated 3-Apr-17 8:04am

Add a Solution

4 solutions

Solution 2

Why to force doors wide open? Java supports custom formats for date formatting.

Check this: Customizing Formats[^]
SimpleDateFormat (Java Platform SE 6)[^]

Another way is shown here: Change date format in a Java string - Stack Overflow[^]

Posted 27-Sep-16 21:53pm

Maciej Los

Solution 3

i have experienced the same problem, the wrong u did was that the months in callender class starts from 0 to 11,
so 0=January,
1= February ,...
..
...
and so on...
the solution to that problem is ..

Java

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);
		int month = in.nextInt();
		int day = in.nextInt();
        
        
        int year = in.nextInt();
        Calendar cal = Calendar.getInstance();
          
      /// cal.set(month,day,year);
	  cal.set(cal.YEAR,year);
	  cal.set(cal.MONTH,month-1);
	  cal.set(cal.DATE,day);
//System.out.println("Calendar's year:-- " + cal.get(Calendar.YEAR));
	  // System.out.println("Calendar's month:-- " + cal.get(Calendar.MONTH));
		
		 //  System.out.println("Calendar's Date:-- " + cal.get(Calendar.DATE));
		  // System.out.println( + cal.get(Calendar.DAY_OF_MONTH));
		 //   System.out.println("Calendar's Day:-- " + cal.get(Calendar.DAY_OF_WEEK));
        // switch(cal.get(cal.DAY_OF_WEEK))
		
						switch(cal.get(Calendar.DAY_OF_WEEK))
            {
            case 1:System.out.println("SUNDAY");
            break;
            case 2:System.out.println("MONDAY");
            break;
            case 3:System.out.println("TUESDAY");
            break;
            case 4:System.out.println("WEDNESDAY");
            break;
            case 5:System.out.println("THURSDAY");
            break;
            case 6:System.out.println("FRIDAY");
            break;
            case 7:System.out.println("SATURDAY");
            break;
        }
    }
}

Posted 14-Jan-17 23:13pm

Member 12950633

Solution 4

The answer will be

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);
        int month = in.nextInt();
        int day = in.nextInt();
        int year = in.nextInt();
        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month-1);
        c.set(Calendar.DAY_OF_MONTH, day);
        int day_of_week = c.get(Calendar.DAY_OF_WEEK); 
        String[] days = {"SUNDAY","MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY"};
        System.out.print(days[day_of_week-1]);
    }
}

Posted 3-Apr-17 8:04am

Member 11760184

Comments

CHill60 3-Apr-17 18:17pm

In what way is this different to Solution 3? Don't do this

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Garth J Lancaster · Accepted Answer · 2016-09-27T20:42:00

Solution 1

are you sure

cal.set(month,day,year);

is correct ? I'd have a look at the doc Calendar (Java Platform SE 7 )[^] - I would have thought using a calendar for this was overkill - in my day we used Zeller's congruence and liked it Zeller's congruence - Wikipedia, the free encyclopedia[^]

Posted 27-Sep-16 20:42pm

Garth J Lancaster

Comments

GaneshRfromSpace 28-Sep-16 5:03am

Thanks. Implemented Zeller's rule and it worked fine for all test cases.