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POHow to associate JTextArea and Object? How to know which object belongs to which jtextArea?
 

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  1. POHow to associate JTextArea and Object? How to know which object belongs to which jtextArea?
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    <p>I am writing a program that allows the user to provide the URL to RSS feeds, downloads and parses the information, and then displays it to <code>JTextArea</code>s.</p> <ul> <li>The user can add as many feed categories as he/she wants. (each category is represented in a separate pane)</li> <li>The user can add as many feeds in a category as he/she wants.</li> <li>The user can either add a new feed or a new category. </li> </ul> <p>I have an ArrayList(ArrayList) = categoryList. Each of it's items are category = ArrayList. And the Feed objects contain a getContents() method which returns ArrayList.</p> <p>I want to associate every Feed with a JTextArea. Then I want to iterate through the FeedItems, while displaying them in the corresponding JTextArea.</p> <p>I am really stuck on finding a way to associate a one to one map between Feed &lt;=> JTextArea.</p> <p>Here is my attempt:</p> <pre><code>if (category_list.size() &gt; 0) { final java.util.Iterator&lt;ArrayList&lt;Feed&gt;&gt; categoryListIterator = category_list.iterator(); final ArrayList&lt;Feed&gt; currCategory; final java.util.Iterator&lt;Feed&gt; currFeedIterator; while (categoryListIterator.hasNext()) { currCategory = categoryListIterator.next(); while (((java.util.Iterator&lt;ArrayList&lt;Feed&gt;&gt;) currCategory).hasNext()) { ArrayList&lt;Feed&gt; currFeed = ((java.util.Iterator&lt;ArrayList&lt;Feed&gt;&gt;) currCategory).next(); currFeedIterator = currFeed.iterator(); while (currFeedIterator.hasNext()) { Feed feed = currFeedIterator.next(); final java.util.Iterator&lt;FeedItem&gt; feedIterator = feed.getContents().iterator(); while (feedIterator.hasNext()) { // find the appropriate JTextArea // iterate through the articles. correspondingJtextArea.setText(feedIterator.next().toString()); } } } } } </code></pre> <p>Please let me know, what would be the best way of keeping track in which <code>JTextArea</code> I should change the text.</p> <p>Am I iterating through all the Feeds here correctly? A short example that illustrates my situation would be very very helpful.</p> <p><strong>UPDATE</strong>: </p> <p>Okay, so now I'm okay iterating through all the feeds. I only need to find a way to write a HashMap which associates a Feed with a JTextArea.</p>
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    1. CO*"I AM WRITTING A PROGRAM THAT.."* Fix your SHIFT key first!
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    2. COSee also this [Q&A](http://stackoverflow.com/q/10461087/230513) for a concise example that uses a single `JTextPane`.
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    3. COI have to have JtextAreas to display the Feed Content. Is there something such as Hashtables which could help?
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