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Leonid Shalupovandintellij-monorepo-bot
40795fe787
GitOrigin-RevId: 8b2b63fc6db476ca0c2cfe5cadd84db6c4236d0f
26 lines
1014 B
HTML
26 lines
1014 B
HTML
<html>
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<body>
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Reports <code>null</code> assigned to an <code>Optional</code> variable or returned from a method returning <code>Optional</code>.
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<p>It's recommended that you use <code>Optional.empty()</code> (or <code>Optional.absent()</code> for Guava) to denote an empty value.</p>
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<p>Example:</p>
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<pre><code>
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Optional<Integer> foo(boolean flag) {
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return flag ? Optional.of(42) : null;
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}
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</code></pre>
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<p>After the quick-fix is applied:</p>
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<pre><code>
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Optional<Integer> foo(boolean flag) {
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return flag ? Optional.of(42) : Optional.empty();
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}
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</code></pre>
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<!-- tooltip end -->
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<p>Configure the inspection:</p>
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<p>
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Use the <b>Report comparison of Optional with null</b> option to also report comparisons like <code>optional == null</code>. While in rare cases (e.g. lazily initialized
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optional field) this might be correct, optional variable is usually never null, and probably <code>optional.isPresent()</code> was
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intended.
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</p>
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<p><small>New in 2017.2</small>
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</body>
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</html> |