Assignment 1 Solution

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Task: Your task is to build upon your calendar from Assignment 1. You will be

Task:
YourTask:
Your task is to build upon your calendar from Assignment 1. You will begin by fixing a few things then adding more functionality to your program. Over the course of the quarter, we will be adding to this calendar to make it more functional and robust. For this part, you will be adding more functionality to make it more usable and user friendly. At the end of this assignment, your calendar should still work as intended for Assignment 1, but with additional features.
The first part of this assignment will be to add a user menu. The user of your program should be able to interact with your program through the console. You should include these commands for the user: “q” to quit the program, “n” to display the next month, “p” to display the previous month, “e” for the user to enter a date and display the calendar for that month, “t” to get today’s date and display a calendar for this month. To implement this user menu, you will need to have a while loop in your main. If the user enters an unknown command, your program should prompt them to enter a valid command. An image of the menu and the behavior for unknown commands is to the right:

If the user has not already displayed a month, the next month and previous month commands should tell the user that they need to have a calendar displayed first. Your program should not crash in this instance. Additionally, if the calendar displayed is 12 or 1 and next month or previous month are called, your calendar should proceed accordingly wrapping around to 1 and 12 like a regular calendar would.
The user should be able to select several different commands in one run of your program. After each command is finished running, the menu should be displayed again and wait for the user’s next command. This should continue until the user selects “q” to quit the program.
In addition to the menu, you should add a few fixes to our first calendar. At the end of this assignment, your calendar should display the correct number of days for each month. Also, each month displayed should start on the correct day of the week. For example, if you were printing out the calendar to display October, October 1st should start on Saturday.
As the user enters a specific date and today is a specific date, your calendar should also have some sort of indication on the user’s date or today (depending on what command the user gave). You might draw something in the cell to indicate that date or write “date” in the cell. It is up to you how you provide the indication of the date, but some sort of visual indication must be made in the cell of the specific date.
Implementation Details:
Your program should include all the methods from the previous assignment. You may introduce your own new methods as well. You will need to modify some of the methods you have written to add the new functionality for this assignment. You may use different parameters and returns the methods.
Helpful Information:
To get today’s date, you will likely want to make use of a Calendar object that is already implemented by Java. This object stores basic information that we can access. To use this object, you will want to create a new Calendar object (be careful that your class is also not named Calendar or Java will get confused). The code for that would look like Calendar name = Calendar.getInstance(). This gets the current date and stores it in this Calendar object.
To access the information we want, we need to use the Calendar’s get method. For instance, if we wanted the month we would use name.get(Calendar.MONTH), or if we wanted the day we would usename.get(Calendar.DATE). Calendar.MONTH and Calendar.DATE are just ways to refer to the locations where those values are stored.
You also may make use of a number of String functions. The indexOf and substring methods could be of particular use. The indexOf method finds the index of the first occurrence of the given character in the String you call the function on. For example, if we had “Hello” store in a variable x, calling x.indexOf(“l”) would return a value of 2 since the first “l” is located at index 2 in the String “Hello”.
The substring method creates a new string from the starting index given to the ending index given (it does not include the character in the ending index). If not ending index is given, then a substring from the beginning index to the end of the String is created. If we wanted a substring of “Hello” that just captured “ell” and if “Hello” was stored in variable x, we could call x.substring(1, 4). If we wanted just “llo”, we could call x.substring(2).
Finally, you may find it useful to convert a number as a String into an integer value. To do this, we can call Integer.parseInt(String), where String is the String value of the integer we want.
Style:
It is important that you get used to writing code in good style. What is demonstrated in examples in class is considered good style. Additionally, you should look at the style guide located on Canvas. Badly styled code will lose points.
You may not use material beyond Chapter 5 for this assignment. You may make use of the tools we have learned up through Chapter 5 and those stated in the Helpful Information section on this specification. String, Math, Scanner and other objects and their functionality that we have gone over in class and that are covered in the book through Chapter 5 are acceptable to use. We have also use random, and booleans and for loops and while loops and if/else’s
task is to build upon your calendar from Assignment 1. You will begin by fixing a few things then adding more functionality to your program. Over the course of the quarter, we will be adding to this calendar to make it more functional and robust. For this part, you will be adding more functionality to make it more usable and user friendly. At the end of this assignment, your calendar should still work as intended for Assignment 1, but with additional features.
The first part of this assignment will be to add a user menu. The user of your program should be able to interact with your program through the console. You should include these commands for the user: “q” to quit the program, “n” to display the next month, “p” to display the previous month, “e” for the user to enter a date and display the calendar for that month, “t” to get today’s date and display a calendar for this month. To implement this user menu, you will need to have a while loop in your main. If the user enters an unknown command, your program should prompt them to enter a valid command. An image of the menu and the behavior for unknown commands is to the right:

If the user has not already displayed a month, the next month and previous month commands should tell the user that they need to have a calendar displayed first. Your program should not crash in this instance. Additionally, if the calendar displayed is 12 or 1 and next month or previous month are called, your calendar should proceed accordingly wrapping around to 1 and 12 like a regular calendar would.
The user should be able to select several different commands in one run of your program. After each command is finished running, the menu should be displayed again and wait for the user’s next command. This should continue until the user selects “q” to quit the program.
In addition to the menu, you should add a few fixes to our first calendar. At the end of this assignment, your calendar should display the correct number of days for each month. Also, each month displayed should start on the correct day of the week. For example, if you were printing out the calendar to display October, October 1st should start on Saturday.
As the user enters a specific date and today is a specific date, your calendar should also have some sort of indication on the user’s date or today (depending on what command the user gave). You might draw something in the cell to indicate that date or write “date” in the cell. It is up to you how you provide the indication of the date, but some sort of visual indication must be made in the cell of the specific date.
Implementation Details:
Your program should include all the methods from the previous assignment. You may introduce your own new methods as well. You will need to modify some of the methods you have written to add the new functionality for this assignment. You may use different parameters and returns the methods.
Helpful Information:
To get today’s date, you will likely want to make use of a Calendar object that is already implemented by Java. This object stores basic information that we can access. To use this object, you will want to create a new Calendar object (be careful that your class is also not named Calendar or Java will get confused). The code for that would look like Calendar name = Calendar.getInstance(). This gets the current date and stores it in this Calendar object.
To access the information we want, we need to use the Calendar’s get method. For instance, if we wanted the month we would use name.get(Calendar.MONTH), or if we wanted the day we would usename.get(Calendar.DATE). Calendar.MONTH and Calendar.DATE are just ways to refer to the locations where those values are stored.
You also may make use of a number of String functions. The indexOf and substring methods could be of particular use. The indexOf method finds the index of the first occurrence of the given character in the String you call the function on. For example, if we had “Hello” store in a variable x, calling x.indexOf(“l”) would return a value of 2 since the first “l” is located at index 2 in the String “Hello”.
The substring method creates a new string from the starting index given to the ending index given (it does not include the character in the ending index). If not ending index is given, then a substring from the beginning index to the end of the String is created. If we wanted a substring of “Hello” that just captured “ell” and if “Hello” was stored in variable x, we could call x.substring(1, 4). If we wanted just “llo”, we could call x.substring(2).
Finally, you may find it useful to convert a number as a String into an integer value. To do this, we can call Integer.parseInt(String), where String is the String value of the integer we want.
Style:
It is important that you get used to writing code in good style. What is demonstrated in examples in class is considered good style. Additionally, you should look at the style guide located on Canvas. Badly styled code will lose points.
You may not use material beyond Chapter 5 for this assignment. You may make use of the tools we have learned up through Chapter 5 and those stated in the Helpful Information section on this specification. String, Math, Scanner and other objects and their functionality that we have gone over in class and that are covered in the book through Chapter 5 are acceptable to use. We have also use random, and booleans and for loops and while loops and if/else’s


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