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Thread: Help!! Schedual class with time and date

  1. #1
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    Question Help!! Schedual class with time and date

    I am in need of some help to solve a task but I have no clue how to do!!
    The task is to design and implement a class representing a schedule. It should be possible to add and remove moments and I can use ints to represent date and time and it should be a method that checks that no moments collide, the method should not write anything but retur a boolean!
    Now this is how far I have gotten:

    import java.util.ArrayList;
    public class Schema {
    private static final int MAX = 31;
    private ArrayList<Integer> numbers = new ArrayList<Integer>();

    private boolean okNumber(int i) {
    return i >= 0 && i <= MAX;
    }
    public void add(int i) {
    if (okNumber(i) && !numbers.contains(i) ){
    numbers.add(i);
    }
    }
    public void delete(int i) {
    if (okNumber(i))
    numbers.remove((Integer) i);
    }

    The problem is how to get the time in the class, i have no idéa and would be very happy for any help!!


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    Default Re: Help!! Schedual class with time and date

    You said that you could use ints to represent time, but did you know that Java already has Calendar and Date classes that are very useful for this kind of thing? Can you use those?

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    Default Re: Help!! Schedual class with time and date

    I can use those too, however wouldnt the class be more complicated by using them? Since its only a class and not a program? (Sry i am a beginner)

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    Default Re: Help!! Schedual class with time and date

    I understand the beginner's concern that MoreClasses = MoreComplicated.

    That's simply not true if the MoreClasses side of the equation is mostly classes that already exist in Core Java. That means someone else has already done a lot of the work so you won't have to.

    Build your program on the backs of those who've gone before you, hopefully writing good code for you to use. Their efforts should save you work and get you started the right direction.

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    Default Re: Help!! Schedual class with time and date

    thanks for the tips, would be very helpful with some code since i have no idéa how to do. Can i still use a arraylist, and if i still would want to use int how should i do it?

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    Default Re: Help!! Schedual class with time and date

    There are many tutorials with example code on the web for Java Calendar, GregorianCalendar, Date, etc. Dive in and start reading and writing.

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    Default Re: Help!! Schedual class with time and date

    the thing is, ive got a "OK" on what ive done sofar, how can i complete the class that i have started??

    --- Update ---

    shoul i use objects instead of ints to combine time and date (int, int)

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    Default Re: Help!! Schedual class with time and date

    Whether you use existing classes for dates and times or develop your own, the Schedule class you're designing will have to contain events with names, start and stop dates and times, and the methods needed to do the checking you've described. At a minimum, I suggest you need an Event class (or the name of your choice) to describe the events which will make up the items in the schedule.

    If you proceed down the events as ints path, how will you name the items? How will you determine start and stop dates and times. For the latter, you could count the number of minutes from some point in time (your birthday?) and then calculate the date and time of day from that, but that's where using the existing classes begins to look a lot more attractive.

    It's not an easy problem, and I'm not sure you've thought it through very far. Give your design some more thought and determine how you'd answer some of the questions I've raised. Others will probably occur to you as you proceed.

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