"Uses or overrides a deprecated API" compiler warning
<p>I got a compilation warning in Java:</p>

<pre><code>Note: C:\Users\*****\Desktop\sudoku\GraphicallyRepresentation.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

Process completed.
</code></pre>

<p>What does it mean? The program runs fine but the note is what I'm worried about.</p>
