title: How to convert Values in a Hashmap to a List<String>
body: <p>I have a Hashmap of type  </p>
  
  <pre><code>Map&lt;String, List&lt;String&gt;&gt; adminErrorMap = new HashMap&lt;&gt;();
  </code></pre>
  
  <p>I want to be able to iterate thru the entire hashmap and get all the values to a single <code>List&lt;String&gt;</code>. The Keys are irrelevant.</p>
  
  <p>I have done something like this:</p>
  
  <pre><code>List&lt;String&gt; adminValues = new ArrayList&lt;&gt;();
  
  for (Map.Entry&lt;String, List&lt;String&gt;&gt; entry : adminErrorMap.entrySet()) {                
           adminValues.add(entry.getValue().toString());
      }
  System.out.println(adminValues);
  </code></pre>
  
  <p><strong>Output</strong></p>
  
  <blockquote>
    <p>[[{description=File Path, value=PurchaseOrder.plsql},
    {description=Component, value=PURCH}, {description=Commit Date,
    value=Thu May 05 00:32:01 IST 2016}],[{description=File Path,
    value=CustomerOrder.plsql}, {description=Component, value=COMP},
    {description=Commit Date, value=Thu June 05 00:32:01 IST 2016}]]</p>
  </blockquote>
  
  <p>As you can see, there are [] inside a main []. </p>
  
  <p>How to have all values inside one []. Like shown below; </p>
  
  <p>Or is there any other way to implement this?</p>
  
  <blockquote>
    <p>[{description=File Path, value=PurchaseOrder.plsql},
    {description=Component, value=PURCH}, {description=Commit Date,
    value=Thu May 05 00:32:01 IST 2016},{description=File Path,
    value=CustomerOrder.plsql}, {description=Component, value=COMP},
    {description=Commit Date, value=Thu June 05 00:32:01 IST 2016}]</p>
  </blockquote>