title: How to create a loop through LinkedHashMap<String,ArrayList<String>>?
body: <p>Please help me to create a loop through <code>LinkedHashMap&lt;String,ArrayList&lt;String&gt;&gt; h</code>:</p>
  
  <pre><code>if (h.get("key1").size() == 0)
      System.out.println("There is no errors in key1.");
  else
      System.out.println("ERROR: there are unexpected errors in key1.");
  
  if (h.get("key2").size() == 0)
      System.out.println("There is no errors in key2.");
  else
      System.out.println("ERROR: there are unexpected errors in key2.");
  
  if (h.get("key3").size() == 0)
      System.out.println("There is no errors in key3.");
  else
      System.out.println("ERROR: there are unexpected errors in key3.");
  
  if (h.get("key4").size() == 0)
      System.out.println("There is no errors in key4.\n");
  else
      System.out.println("ERROR: there are unexpected errors in key4.\n");
  </code></pre>