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Thread: How do I display 4 items at a time of an ArrayList?

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    Default How do I display 4 items at a time of an ArrayList?

    Hi everyone, I have some basic Java skills and kept experimenting with code and obviously getting stuck with it. I've been recently trying to create an address program but I don't have a clue on how to carry on. In short, I have an ArrayList which contains a list of addresses. They are too many to get displayed so I want to display 4 addresses at a time in a GUI starting from the latest entry. The GUI has one button called previous. Can anyone help me out with a code or some tips.


    Any help will be very appreciated
    Last edited by JavaStruggler; August 18th, 2011 at 07:05 AM.


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    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: How do I display 4 items at a time of an ArrayList?

    If it's that urgent, I suggest reading through the Swing tutorial and providing an SSCCE that demonstrates what you've tried.
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
    Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!

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    Default Re: How do I display 4 items at a time of an ArrayList?

    H Kevin,
    Thank you for your reply,
    Actually the GUI I created works fine and also the rest of the code, the only problem I have is that I don't know how to display only 4 items at a time instead of the whole list. I would really appreciate any help, even few tips.
    Thank you

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    Default Re: How do I display 4 items at a time of an ArrayList?

    Suggested reading: How To Ask Questions The Smart Way

    There are so many ways to do what you wish, point being unless you've given us details on what you've tried we could be throwing darts at a dartboard that does not exist. For instance, you could ditch the 4 at a time and use a JScrollPane, you could use a CardLayout, you could create a class which holds 4 objects of your type, you could iterate through the arraylist 4 at a time, etc...

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    Default Re: How do I display 4 items at a time of an ArrayList?

    Hi copeg, thank you so much for your tips.
    I don't want to use JScrollPane or CardLayout, I look for a simpler solution. What I wish to do is to iterate through the arraylist, I tried to use an ordinary for loop but the result was that i only managed to display the last 4 objects. Basically I'd like to display 4 items every time I click the 'previous' button until there are no more elements left.

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    Default Re: How do I display 4 items at a time of an ArrayList?

    another approach is to use an index into the array list vs for each.
    Keep track of the current first element. Go forward by adding 4, go back by subtracting 4.
    Get the 4 elements starting at the index's value.

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