How to count the occurrence of a given object in a list?
<p>for eg I have a list and a class called Sample: 
The list is :</p>

<pre><code>List&lt;Object&gt; testList = new ArrayList&lt;&gt;();
testList.add("a");
testList.add("b");
testList.add(new Sample());
testList.add(new Sample());
</code></pre>

<p>How can I get the count of occurrences of Object Sample from the list?</p>