How can i get the index of the first and last char in string?
<p>Assume the below string : </p>

<pre><code>String value = "161207CAD140000,0";
</code></pre>

<p>how can i get the index of the first char and the index of the last char for the substring <code>CAD</code>
notice that the size of the substring may be changed from 2 ,3 or etc chars i want the solution to be dynamic.</p>