title: Why is Eclipse not showing values of all objects in the Debug perspective?
body: <p>When debugging a Java application in Eclipse JDT, values of some variables are displayed in the Variables view but not in tooltips when hovering over the variables in the editor.</p>
  
  <p>The following screenshot illustrates the problem:</p>
  
  <p><img src="https://i.stack.imgur.com/Mjd4c.png" alt="enter image description here"></p>
  
  <p>As you can see a tooltip with a variable value is shown for <code>this</code>. However no tooltip (or the one containing only declaration in case of Combined Hover) is shown for <code>key</code> while the Variables view shows values for both <code>this</code> and <code>key</code>.</p>
  
  <p>I've tried Combined Hover and Variable Values in Java/Editors/Hovers as suggested <a href="https://stackoverflow.com/q/1730628/471164">here</a> with a similar effect. The only difference is that Combined Hover shows declaration in a tooltip when Variable Values doesn't show a tooltip at all.</p>