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37 lines
1023 B
HTML
37 lines
1023 B
HTML
<html>
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<body>
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Reports assignments to, <code>catch</code> block parameters.
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<p>Changing a <code>catch</code> block parameter is very confusing and should be discouraged.</p>
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<p>The quick-fix adds a declaration of a new variable.</p>
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<p><b>Example:</b></p>
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<pre><code>
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void processFile(String fileName) throws Exception {
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try {
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doProcessFile(fileName);
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} catch(Exception ex) {
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if (ex instanceof UncheckedIOException) {
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// Warning: catch block parameter reassigned
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ex = ((UncheckedIOException) ex).getCause();
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}
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throw ex;
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}
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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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void processFile(String fileName) throws Exception {
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try {
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doProcessFile(fileName);
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} catch(Exception ex) {
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Exception unwrapped = ex;
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if (unwrapped instanceof UncheckedIOException) {
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unwrapped = ((UncheckedIOException)
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unwrapped).getCause();
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}
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throw unwrapped;
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}
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}
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</code></pre>
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<!-- tooltip end -->
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</body>
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</html> |