HashMap value change after "get"
<p>I have a </p>

<pre><code>private Map&lt;String,List&lt;ProductScheme&gt;&gt; discountMap = new HashMap&lt;String,List&lt;ProductScheme&gt;&gt;();
</code></pre>

<p>now if i get list from <code>discountMap</code> and add an item in list
will i have to put the list again in <code>discount map</code> or it will not be required ??</p>
