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Thread: Returning a list in a specified order

  1. #1
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    Default Returning a list in a specified order

    I'm very new to Java and have been learning through online tutorials thus far getting some of the basics down. I was asked to create a list that would return names by order of age.
    I don't even know where to really begin with this code as I've yet to learn how to do so. I'm not asking anyone to write the code for me but I'd like to know where to start or a resource to learn what method to use for returning a list ordered by a specific parameter. Basically the directions go like this:

    "Create a class called Department which will contain a list of employees.
    a) Department class will have a method which will return its employees ordered by age."

    Any help would be deeply appreciated. Am I working with an array?


  2. #2
    Senior Member PhHein's Avatar
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    Default Re: Returning a list in a specified order

    No, you'll be using a List. Collections.sort() can sort that List. You have to specify a Comparator.

    So, google the above in conjunction with Java: "List Java" etc.

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    Default Re: Returning a list in a specified order

    Well a few things you have to do:
    1. Figure out how you will be storing your variables (names, ages, etc...)
    2. What will you be using to store this data? (Array, List, Binary Tree)
    3. Figure out how the data will be accessed and sorted.

    It won't be to difficult once you know what you want to do. Anything you get stuck on you can always post questions about. As long as you are trying and not expecting for us to do the work for you we will gladly help you out.

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    Default Re: Returning a list in a specified order

    Are you allowed to use Collections.sort() or do you have to implement the sorting yourself?
    Improving the world one idiot at a time!

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    Default Re: Returning a list in a specified order

    Thank you for the replies.

    I believe I can use Collections.sort(). Been looking up how to use that method for what I'm trying to achieve and feel like I'm biting off more than I can chew at my current skill level.

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