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    <p>There's a couple of problems:</p> <ol> <li><p><code>ParseInt</code> and <code>ParseDouble</code> are used for <em>reading</em> CSV Strings into <code>Integer</code> and <code>Double</code> respectively. See the handy table <a href="http://supercsv.sourceforge.net/cell_processors.html" rel="nofollow">here</a> to see what cell processors can be used for reading/writing or both. You can leave them <code>null</code> if you want, and Super CSV will just call <code>toString()</code> on each object.</p></li> <li><p>The exception you're getting (1 column / 8 processors) indicates that you're expecting there to be 8 columns (i.e. 8 elements in your List), but there's only 1. You're only passing a single String into <code>Arrays.asList()</code> - looks like you're assuming this method actually splits the String into a List (it doesn't!).</p></li> <li><p>Why are you converting your rent data List to a String? That is really bizarre. If your data needs any manipulation (I'm not sure if it does), then you should be updating each element in your List, not converting the whole List to a String then trying to split it up again.</p></li> <li><p>What is the output when you don't do any replacement, i.e. what happens when you pass your <code>rentData</code> list directly to <code>listWriter.write()</code>?</p></li> </ol> <p>Can I suggest you fix the processor set up (replace the <code>ParseInt</code> and <code>ParseDouble</code> with <code>null</code>), pass the <code>rentData</code> List directly to Super CSV...</p> <pre><code>listWriter.write(rentData, processors); </code></pre> <p>...then post the result (output/stacktrace) to your question. </p>
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    1. POHow to write a list to CSV with Super CSV
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    1. USJames Bassett
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    1. POHow to write a list to CSV with Super CSV
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    1. COrentdata list doesnt have any commas or speech marks, just the numbers with a space hence all the replaces..Your exactly right, however i cant think of another way of doing it @Hound Dog
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      1. USj bel
    2. CO@jbel Just checking, but you _are_ aware that Super CSV puts the quotes and commas in for you? You should be just passing your List of Strings to Super CSV and letting it do all the work.
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    3. COi tried putting the list straight in but i get error the number of coll to be processed 229326 must match cellprocessor (8) which gave me the hint that i must put the "" and , in
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