title: Working with arraylist in java/android
body: <p>I am little confused as to what -1 represents in the following arraylist. Can someone help me out please, thanks.</p>
  
  <pre><code>toyList.add(new toyStore(toyName[0], toyIcon.getResourceId(0, -1)));
  toyList.add(new toyStore(toyName[1], toyIcon.getResourceId(1, -1)));
  </code></pre>