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Thread: Stuck on this code!

  1. #1
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    Default Stuck on this code!

    I am in a low level class and I get stuck right after this:

    This is my Tester class:import java.util.Scanner;

    /**
    This program calculates the season for a given month and day.
    */
    public class Seasons
    {
    public static void main(String[] args)
    {
    String season;
    Scanner in = new Scanner(System.in);

    System.out.print("Please enter a date (month and day): " );
    int month = in.nextInt();
    int day = in.nextInt();
    Season s = new Season(month, day);
    System.out.println("Season: " + s.getDescription());
    }
    }

    And this is my main class "season"

    class Season{
    private int month;
    private int day;

    public Season(int aMonth, int aDay)
    {
    int month = aMonth;
    int day = aDay;
    }

    public String getDescription()
    {
    {
    String r;
    if (month==1){r = "Winter"; }
    else if (month==2){r = "Winter"; }
    else if (month==3){r = "Winter"; }
    else if (month==4){r = "Spring"; }
    else if (month==5){r = "Spring"; }
    else if (month==6){r = "Spring"; }
    else if (month==7){r = "Summer"; }
    else if (month==8){r = "Summer"; }
    else if (month==9){r = "Summer"; }
    else if (month==10){r = "Fall"; }
    else if (month==11){r = "Fall"; }
    else if (month==12){r = "Fall"; }
    else {r = "Not valid";}
    return r;
    }
    }
    }


  2. #2
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    Default Re: Stuck on this code!

    Quote Originally Posted by bankoscarpa View Post
    I am in a low level class and I get stuck right after this:
    Hello bankoscarpa!
    Where are you stuck? Do you have a specific question?

  3. #3
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    Default Re: Stuck on this code!

    Try to be more descriptive in the future with what your problem is, and wrap your code in code tags. I can tell your problem is with this part of your code:
    private int month;
    private int day;
     
    public Season(int aMonth, int aDay)
    {
    int month = aMonth;
    int day = aDay;
    }

    Welcome to World of Scope! Lots of people have trouble with this as beginners. You have the class variables month and day, and then you have the local variables month and day. In order to set the class variables (which I assume is what you are trying to do), you should not create local variables. The statement: int month = aMonth; creates a local variable named month, that immediately gets trashed as soon as the Constructor finishes. To set the month class variable instead, simply get rid of the int declaration: month = aMonth;
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  4. The Following User Says Thank You to aussiemcgr For This Useful Post:

    bankoscarpa (May 2nd, 2012)

  5. #4
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    Default Re: Stuck on this code!

    That makes sense! I was not sure what I was doing wrong. When the code runs, it has no limit on what the day input is. If i put that the month is 2 and the day is 78, it will still return what i had for the month. How would i go about fixing that? Do i just add another if statement?
    Thank you!!!!

  6. #5
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    Default Re: Stuck on this code!

    The if/else statements would be the basic way of doing it. However, if you wanted to do it while also embracing the already provided java libraries, you could say:
    day = ? //day variable provided
    month = ? //month variable provided
    year = ? //year variable provided
     
    Calendar calendar = Calendar.getInstance();
    calendar.set(year, month, 1);
    if(day>calendar.getActualMaximum(Calendar.DAY_OF_MONTH)) {
         //tell the user there is a problem or something
    }

    There is nothing inheritly *wrong* with the above code, but it does take up significantly more memory than just the if/else statements and will run a few milliseconds slower. On a program this small, memory usage and wasting a few milliseconds isn't a problem, but it does become a problem if you have REALLY REALLY large and memory-heavy programs.
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  7. The Following User Says Thank You to aussiemcgr For This Useful Post:

    bankoscarpa (May 2nd, 2012)

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    Default Re: Stuck on this code!

    I see, well I have a specific way of being graded. (on wiley plus) That means I should probably stick to if/else statements. I do not get the part where i have two parameters in the get method. I still am stuck on the " day " statement. I attached it. Thank you!
    wiley.jpg

  9. #7
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    Default Re: Stuck on this code!

    I can't see the picture, it is too small. Keep in mind that when calculating the days of the month, you have to consider that some months have 30 days and some have 31 days, and some years, February has 28 days and other years it has 29 days.
    NOTE TO NEW PEOPLE LOOKING FOR HELP ON FORUM:

    When asking for help, please follow these guidelines to receive better and more prompt help:
    1. Put your code in Java Tags. To do this, put [highlight=java] before your code and [/highlight] after your code.
    2. Give full details of errors and provide us with as much information about the situation as possible.
    3. Give us an example of what the output should look like when done correctly.

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  10. The Following User Says Thank You to aussiemcgr For This Useful Post:

    bankoscarpa (May 3rd, 2012)

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