title: Java Get last key from Hashmap
body: <p>previously I apologized if my question is classic. but because I just learned Java programming for android, I didn't really understand the commands.</p>
  
  <p>I'm currently making an application with the code section as follows:</p>
  
  <pre><code>Map&lt;Integer, CompTypes&gt; mapCompTypes = new java.util.HashMap();
  
  class CompTypes
  {
      int androidId;
      AndroidViewComponent component;
      String text;
      String type;
      CompTypes(int androidId, AndroidViewComponent component, String type, String text)
      {
          this.androidId = androidId;
          this.component = component;
          this.type = type;
          this.text = text;
      }
  }
  
  public void SendMessage(HVArrangement container, String message, String dateTime, int fontSize, int fontColor, int alignment, int startid)
  {
      int id = Integer.parseInt(ChatBox.this.GetLastId());
      TextBox comp = new TextBox(vertical);
      comp.getView().setId(id);
      comp.Text(message);
      comp.FontSize(fontSize);
      comp.TextColor(fontColor);
      comp.MultiLine(true);
      comp.Enabled(false);
      comp.RequestFocus();
      mapCompTypes.put(Integer.valueOf(id), new CompTypes(id, comp, compType, comp.Text()));
  
      int id2 = id + 1;
      Label dt = new Label(vertical);
      dt.getView().setId(id2);        
      ((TextView)dt.getView()).setText(android.text.Html.fromHtml(datetime));
      dt.HTMLFormat(true);
      dt.Text(datetime);
      dt.getView().setOnClickListener(this);
      dt.getView().setOnLongClickListener(this);
      mapCompTypes.put(Integer.valueOf(id2), new CompTypes(id2, dt, compType, dt.Text()));
  }
  
  
  public String GetLastId()
  {
      // how to get last id?
      //return ids;
  }
  </code></pre>
  
  <p>at the moment I'm having trouble getting the value from id as the last id from Hashmap.
  I've read a number of questions and answers here that "Maps don't have the last entry, it's not part of their contract."
  is there another way to get the last id?</p>