Java Minutiae - I love ternary

I love the ? : ternary operator. It makes my code feel tighter. Plus, I get to save code - fewer assignments, fewer return statements, and variable declarations are inline. In the code I was writing yesterday, a duplicated call to 'add()' made me itch for the ternary:

    for (String key : keys) {
      if (getCardinality(key) == 1) {
        singleValuedKeys.add(key);
      } else {
        multiValuedKeys.add(key);
      }
    }`</pre>
Unfortunately, with standard use of a ternary, the code gets bigger instead of smaller:
<pre class="prettyprint">`    for (String key : keys) {
      Set&lt;String&gt; setToAddTo = (getCardinality(key) == 1)
          ? singleValuedKeys
          : multiValuedKeys;
      setToAddTo.add(key);
    }`</pre>
Taking it one-step further, I inline the `setToAddTo` variable. This is where the code loses its familiar feel:
<pre class="prettyprint">`    for (String key : keys) {
      ((getCardinality(key) == 1)
          ? singleValuedKeys
          : multiValuedKeys).add(key);
    }

It's tight, but somehow I've written Java code that doesn't have the Java feel. So I ended up dropping the ternary, and went with the familiar if/else structure. What's your preference?