Question

In JAVA

Write a program that takes an integer between 1 and 12 inclusive, and a String of three letters (representing the day of the week) from the user, and prints a calendar for the month of the year represented by the integer. For example, if the user enters 1 and "Mon", the program should print the calendar for January, starting the first day of the month on Monday.

Enter the month (1 - 12): 1
Which day of the week is the first day of the month (Mon, Tue, etc.): Mon
Sun Mon Tue Wed Thu Fri Sat
    1   2   3   4   5   6
7   8   9   10  11  12  13
14  15  16  17  18  19  20
21  22  23  24  25  26  27
28  29  30  31

.

Specific requirements include the following.

• Create an array to store number of days for each month for current year
• Create an array to store the seven days (Monday, Tuesday, ect.)
• Ask the user which day of the week the first day of the month is.
• Print the calendar as a table starting with Sunday
• You should check for user errors when taking the input and ask the user to enter valid input

Answer 1

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
        int i,month,x=0,ct;
        int[] months=new int[31];
        String day,str;
        String[] days = new String[7];
             days[0] = "sun";
             days[1] = "mon";
             days[2] = "tue";
             days[3] = "wed";
             days[4] = "thu";
             days[5] = "fri";
             days[6] = "sat";
           
        Scanner in = new Scanner(System.in);
       System.out.println("Enter Month , Day:");
       month= in.nextInt();
       day= in.nextLine();
      
        for(i=0;i<7;i++){
            str=days[i];
           if(str == day)
                x=i;
        }
      
      
      
        for(i=0;i<7;i++)
            System.out.print(days[i]+"\t");
        System.out.println("");
      
        for(i=0;i<x;i++)
           System.out.print("\t");
          
          
         ct=x;
        if(month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12)
            x=31;
        else if(month==2)
            x=28;
        else
            x=30;
     
     
        for(i=0;i<x;i++){
            System.out.print(" "+(i+1)+"\t");
            ct++;
            if(ct%7==0){
                System.out.println("");
                continue;
            }
        }
          
          
   }
}

output:-