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Postsdbo
PO
 

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    <p>This still won't fix the issue (you code doesn't work... never sorts) but it is updated to use List instead of Vector (Vector is obsolete, cannot be deprecated since official APIs depend on it). Unless you need the synchronization built into Vector use List/ArrayList instead.</p> <p>I also changed the array creation to be closer to generic (cannot truly do generic array creation). </p> <p>Finally I made the whole method generic so that it can work typesafely with things other than Object (so a List or List, etc...).</p> <p>It still gives warnings though. Perhaps you should work on getting the code to work properly before you worry about this particular warning (normally I would not suggest that, but with generics that can sometimes be a better way to do it).</p> <pre><code>public static &lt;T&gt; List&lt;T&gt; shellSort(List&lt;T&gt; ul) { int lcount = ul.size(); int colcount = 4; // 2^x List&lt;T&gt;[] currentCols = (List&lt;T&gt;[])Array.newInstance(List.class, 1); currentCols[0] = ul; for(; colcount &gt; 0; colcount = (colcount / 2)) { List&lt;T&gt;[] tmpCols = (List&lt;T&gt;[])Array.newInstance(List.class, colcount); for(int t1 = 0; t1 &lt; colcount; t1++) { tmpCols[t1] = new ArrayList&lt;T&gt;(); } int tcur = 0; int tcurlvl = 0; int ttmp = 0; for(int t2 = 0; t2 &lt; lcount; t2++) { List&lt;T&gt; vcur = currentCols[tcur]; List&lt;T&gt; vtmp = tmpCols[ttmp]; vtmp.add(vcur.get(tcurlvl)); // step to next place tcur++; ttmp++; if(tcur == currentCols.length) { tcur = 0; tcurlvl++; } if(ttmp == tmpCols.length) { ttmp = 0; } } } return ul; } </code></pre>
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    1. USTofuBeer
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    1. COAfter trying your code and fixing it a bit there it is again: warning: [unchecked] unchecked cast found : java.lang.Object required: java.util.List<T>[] List<T>[] tmpCols = (List<T>[])Array.newInstance(List.class, colcount);
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    2. COYup. There isn't a way to remove the complaint (that I know of) but this code is closer to what you are after (even if you just take the Array.newInstance code). Generally a compiler warning is a bad thing, in this case, since there isn't a way around it, you just have to accept it.
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