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Thread: JComboBox issue. If user selects any item do this... (if statment)

  1. #26
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    OK, but the items are stored in the database, is there a way that i don't need to add a blank row in the database

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    You can add the new blank item at runtime, as well as the items from the database.
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    i think adding a blank item in runtime would be better. How would i be able to do that?Sorry.

    Thanks
    Last edited by kpat; April 3rd, 2012 at 10:11 AM.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    Use the JComboBox.insertItemAt(Object,0); method.
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:27 AM.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    i got this error java.lang.NullPointerException?
    What variable has the null value?
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  7. The Following User Says Thank You to Norm For This Useful Post:

    kpat (April 3rd, 2012)

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    Talking Re: JComboBox issue. If user selects any item do this... (if statment)

    I managed to fix the problem, after some playing around thanks to both of you.

    Norm & aussiemcgr thank you both for your help and support when i had a problem.
    Last edited by kpat; April 3rd, 2012 at 12:06 PM.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:26 AM.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    Please make a small, simple program that compiles, executes and shows the problem.
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:26 AM.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    When you wanted to insert the empty String into the list.
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:27 AM.

  14. #38
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    What happens when you execute the insertItemAt("",0) method?
    Where is the empty String added?
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:27 AM.

  16. #40
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    Can you show an example by making a list and adding comments to describe the problem:
    first item << can see this one
    second item
    third item
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:26 AM.

  18. #42
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    Have you tried any of the JComboBox class's methods to change what is shown?
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    yer but nothing. i tried messing around with the placing and setSelectedIndex(-1) and etc. any ideas?

  20. #44
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    I'd use one of the JComboBox methods.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved
    Last edited by kpat; April 8th, 2012 at 08:26 AM.

  22. #46
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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    Do you have the API doc? Read it looking for any methods that will do what you want. Try all that look useful with lots of different combinations of arguments and see if any of them do what you want.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    ok fine thanks

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    I think you will have to use one of the class's methods. You can experiment the same as I would have to experiment to find it. You will learn something by doing the experiments that will help you in the future.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: JComboBox issue. If user selects any item do this... (if statment)

    problem solved thanks guys

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