</dd><dd><code>useVM</code> - use the built-in exec command for JDK 1.3 if available.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the process started.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.io.IOException</code> - forwarded from the particular launcher used.</dd><dt><span class="strong">Since:</span></dt>
  <dd>Ant 1.5</dd></dl>
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<h4>execute</h4>
<pre>public&nbsp;int&nbsp;execute