Is there such a thing as .charAt().contains()?
<p>Is there a way to to compare a single char in a string to another string?  Here is an example:</p>

<pre><code>String a = "0123456789";
String b = "5 + 3 / 2";

if(b.charAt(0) == 'something in string a') {
    // do something
}
</code></pre>

<p>or</p>

<pre><code>b.charAt(i).contains(a)
</code></pre>
