Failure to install ADT plugin to Eclipse - 'violates contract' error message
<p>Yesterday I had a problem about required items not being found when installing the ADT plugin in Eclipse. I got around that by opening up the download sites list and ticking the two bottom ones on the list, which for some reason were not selected. One of these addresses contained the word "mylyn".
Now, when "fetchingjavax.xml_1.3.4. ........ /mylyn/drops......" (dots indicate other address parts), I had an error message:</p>

<p>An internal error occurred during: "Install download0".
Comparison method violates its general contract!</p>

<p>which can be dismissed, but the installation appears to have stopped.</p>

<p>What to do next?</p>
