title: Test for NaN in java
body: <p>I'm wondering if there is a way to test for NaN in java. The code below is returning NaN where it should be returning "NA".</p>
  
  <pre><code>if (tempAlloc == Double.NaN) {
                  tv4.setText("NA");
              } else {
                  tv4.setText(customFormat("###.#%",
                          Double.toString(tempAlloc)));
              }
  </code></pre>