Warning Avoid using implementation types like 'HashMap'; use the interface instead
<p>I am getting this warning on Sonar.
What It means.
The class in which i get this warning is as:</p>

<pre><code>class A{
private HashMap&lt;String, String&gt; map=new HashMap&lt;String, String&gt;();

//getters and setters

}
</code></pre>

<p>Please,I want Proper Solution to avoid warning on Sonar.</p>
