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| -rw-r--r-- | src/documentation/content/xdocs/faq.xml | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/documentation/content/xdocs/faq.xml b/src/documentation/content/xdocs/faq.xml index e74b6f0901..22c1a4cb4d 100644 --- a/src/documentation/content/xdocs/faq.xml +++ b/src/documentation/content/xdocs/faq.xml @@ -22,6 +22,36 @@ <faqs title="Frequently Asked Questions"> <faq> <question> + My code uses some new HSSF feature, compiles fine but fails when live with a "MethodNotFoundException" + </question> + <answer> + <p>You almost certainly have an older version of POI earlier + on your classpath. Quite a few runtimes and other packages + will ship an older version of POI, so this is an easy problem + to hit without realising.</p> + <p>The best way to identify the offending earlier jar file is + with a few lines of java. These will load one of the core POI + classes, and report where it came from.</p> + <source> +ClassLoader classloader = org.apache.poi.poifs.filesystem.POIFSFileSystem.class.getClassLoader(); +URL res = classloader.getResource("org/apache/poi/poifs/filesystem/POIFSFileSystem.class"> +String path = res.getPath(); +System.out.println("Core POI came from " + path); + </source> + </answer> + </faq> + <faq> + <question> + My code uses the scratchpad, compiles fine but fails to run with a "MethodNotFoundException" + </question> + <answer> + <p>You almost certainly have an older version earlier on your + classpath. See the answer to the similar question above for + how to track this down.</p> + </answer> + </faq> + <faq> + <question> Why is reading a simple sheet taking so long? </question> <answer> |