How to retrieve contents from Map<String, Map<String,String>>?
<pre><code>Map&lt;String, Map&lt;String,String&gt;&gt; regMap = new HashMap&lt;String, Map&lt;String,String&gt;&gt;();
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<p>How do I retrieve contents from <code>regMap</code>? Is there any data structure where I can store three related things ?</p>
