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    <p>Here is what I have found out so far:</p> <p>PDFBox uses a resource file to bound PDF operators/instructions to certain classes which then process the information.</p> <p>If we take a look at the <strong><em>PDFTextStripper.properties</em></strong> resource file under: </p> <blockquote> <p>pdfbox\src\main\resources\org\apache\pdfbox\resources\ </p> </blockquote> <p>we can see that for instance the BT operator is bound to the <strong>org.apache.pdfbox.util.operator.BeginText</strong> class and so on.</p> <p>The <strong>PDFTextStripper</strong> under </p> <blockquote> <p>pdfbox\src\main\java\org\apache\pdfbox\util\ </p> </blockquote> <p>takes this into account and utilizes the processing of the PDF with this classes. </p> <p><strong>BUT all graphical objects are ignored, therefore no information of underline or table structure!</strong></p> <p>Now if we take a look at the <em>PageDrawer.properties</em> resource file we can see that this one bounds to almost all operators available. Which is utilized by <strong>PageDrawer</strong> class under </p> <blockquote> <p>pdfbox\src\main\java\org\apache\pdfbox\pdfviewer\</p> </blockquote> <p>The "trick" is now to find out which graphical operators are those who represent underline and tables and to use them in combination with <strong>PDFTextStripper</strong>.</p> <p>Now this would mean reading the PDF file specification, which is currently way to much work.</p> <p>If someone knows which operators are responsible for which actions to draw underlines and table lines please let me know.</p>
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    1. POPDF find out if text is underlined or a table cell
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    1. COPDF format is like this -- that's the problem. It represents graphical implementation, not semantics. Even reconstructing sentences is difficult -- words or even individual characters are positioned, the 'space' or 'newline' must be algorithmically reconstructed. In short, Adobe are a*holes.
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      1. USThomas W
    2. COHowever, you can accomplish your requirement -- if you are willing to put, say, 12-20 hours of work in. Copying PDFBox classes & extending the internals is often a good starting point. As well as detecting by position, underlines will typically be emitted immediately after their text I expect!
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    3. COAlso try constructing a trivial two-line PDF with underlined text, and see what you can hook coming back in! Should be easy to see it there. Enjoy.
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