How to compare two arraylist?
<p>I have two <code>ArrayList</code>. Each is of size 100000. I want to compare them and count matched elements.</p>

<p>Here's my code:</p>

<pre><code>for (int i = 0; i &lt; mArryLst2.size(); i++) {
   if (ArryLst1.contains(mArryLst2.get(i))) {
       matchedPixels++;         
   }
}
</code></pre>

<p>Here comparison process is taking lot of time.</p>

<p>How to solve and optimize this problem.</p>
