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Thread: Difficulty adding to collection?

  1. #1
    Junior Member
    Join Date
    Nov 2018
    Thanked 1 Time in 1 Post

    Default Difficulty adding to collection?

    I think I have worded my title clumsily, as I am not 100% sure best way to identify my problem, so bear with me.

    I am trying to alter my code so that I can use a user supplied city id value to retrieve the City (an object) to update and then add the new YearData supplied by the user.

    As my code currently stands, I can create a new city, so when I output my file, I have the data for it.

    I can also add yeardata values (an arraylist of objects) which is also outputted to my file.

    However, at present, I cannot combine the two. I cannot create a new city AND populate the new city object with the yeardata Array. Does that make sense?

    City class:


    DataController class (has methods for adding data etc)


    In particular,

     private void addYearData() {        
            System.out.format("\033[31m%s\033[0m%n", "Add Year Data");
            System.out.format("\033[31m%s\033[0m%n", "=============");  
            InputHelper inputHelper = new InputHelper();
             char c=inputHelper.readCharacter("Do you wish to add  new year data for a city? y to continue, t to terminate:");
            if (c=='y'||c=='Y')
                String year=inputHelper.readString("Enter year:");
                 float precip=inputHelper.readFloat("enter precipitation value:");
                 int max=inputHelper.readInt("enter max temp");
                 int min=inputHelper.readInt("enter min temp");
                 int speed=inputHelper.readInt("enter wind speed");
                 String direction=inputHelper.readString("enter wind direction");
                    City newCity= new City(); 
                   YearData yd= new YearData(year, precip, max, min, speed, direction);   
                   char cz = inputHelper.readCharacter("Do you wish to add to an existing city?");
                   int id =inputHelper.readInt("Please enter the ID of the city you wish to add the yeardata to");
            else if (c=='T'||c=='t')

  2. #2
    Join Date
    Sep 2018
    My Mood
    Thanked 38 Times in 36 Posts

    Default Re: Difficulty adding to collection?

    Please don't paste links to code. But please do the following:

    1. Create a small, complete and compilable program that demonstrates the problem. You can used smaller, dummy classes to keep it simple.
    2. Include any error message that you get when either compiling or executing the program.


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