title: store integer and string in map
body: <p>I have the following code:</p>
  
  <pre><code>    public Map&lt;String,?&gt; createItem(String title, String caption) {
  
                Map&lt;String,String&gt; item = new HashMap&lt;String,String&gt;();
                             item.put(ITEM_TITLE, title);
                            item.put(ITEM_CAPTION, caption);
              (***)      item.put(ITEM_NUM, NUM);
  </code></pre>
  
  <p>in line (<em>*</em>) i have error what i need to do to add the integer </p>