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Thread: How to display ArrayList in jTextArea?

  1. #1
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    Question How to display ArrayList in jTextArea?

    Hello,

    I want to display my ArrayList in the text area like this:

    jTextArea.setText(myArrayList);

    But it gives me an error, because it can only set Strings, and my ArrayList is not a String.

    How do I solve this?


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    Default Re: How to display ArrayList in jTextArea?

    What type of objects does your ArrayList contain?

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    Default Re: How to display ArrayList in jTextArea?

    Class objects
    ArrayList<MyClass> = new ArrayList();

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    Default Re: How to display ArrayList in jTextArea?

    Quote Originally Posted by Prog View Post
    jTextArea.setText(myArrayList);
    Obviously this doesn't compile. setText requires a String, not other objects. It's up to you to generate a new String that contains, for example, N lines where each line contains a text about an element.
    I repeat, you have to do this with some specific code, it requires at least a for cycle, and some string concatenations (better if you use a StringBuffer/StringBuilder).
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    Default Re: How to display ArrayList in jTextArea?

    Interesting. Perhaps you could write a toString() method for MyClass and use that to display the MyClass objects as Strings in the JTextArea.

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    Default Re: How to display ArrayList in jTextArea?

    Yes Greg! I got it now!
    What I did is the following:

    jTextArea.setText(myArrayList.toString());

    Works like a charm

    Thank you!

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    Default Re: How to display ArrayList in jTextArea?

    Quote Originally Posted by Prog View Post
    jTextArea.setText(myArrayList.toString());
    Yes, it works. But you are a bit limited by the format imposed by toString() of ArrayList.
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

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    Default Re: How to display ArrayList in jTextArea?

    Just in case you are unfamiliar - and depending upon your needs - a JList or JTable might provide more functionality and neatness when displaying Lists of data.

  9. #9

    Default Re: How to display ArrayList in jTextArea?

    The method append(String) in the type JTextArea is not applicable
    for the arguments (ArrayList.Account.TransactionObject>)

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