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    <p>It may be a limitation in FindBugs; I agree that you've covered all the bases, but your null-check is split across two different conditions. Now these conditions happen to be complementary, so at least one of them will fire if <code>a</code> is null, but depending how sophisticated FindBugs is, it may not recognise this.</p> <p>Two options here, then:</p> <ol> <li><p>Just ignore the FindBugs warning. Due to its nature it <em>will</em> raise some false positives from time to time, so don't feel like you have to rewrite your code to make it 100% happy if you don't think the rewrite is worthwhile on its own merits.</p> <p>You can use the <a href="http://findbugs.sourceforge.net/api/edu/umd/cs/findbugs/annotations/SuppressWarnings.html" rel="nofollow noreferrer"><code>@SuppressWarnings</code> annotation</a> to actually communicate this to FindBugs, if you want the report to show a nice big zero at the end. See <a href="https://stackoverflow.com/questions/1829904/is-there-a-way-to-ignore-a-single-findbugs-warning">this question</a> for an example.</p></li> <li><p>Restructure the condition so that the nullity check on <code>a</code> is more explicit, by nesting <code>if</code> blocks:</p> <pre><code>if (a == null) { return b == null ? 0 : -1; } return b == null ? 1 : a.compareTo(b); </code></pre> <p>Depending on your tastes and style that might be a better rewrite anyway, in that is more clearly says "if <code>a</code> is null, do <em>this</em> calculation and return it, otherwise do <em>this</em> calculation". You can of course change the ternary condition into another <code>if-else</code> block if you prefer that.</p></li> </ol>
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    1. POWhat is the correct way to implement compareObjects()
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    1. USAndrzej Doyle
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    1. COThanks Andrzej, yes there is no point to rewrite my code to make findBugs 100% happy :) I like your statement.
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