doc update to reflect the addition of the -jar option

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269447 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/java.html

@@ -25,7 +25,12 @@ the one that is currently running Ant.</p>
   <tr>
     <td valign="top">classname</td>
     <td valign="top">the Java class to execute.</td>
-    <td align="center" valign="top">Yes</td>
+    <td align="center" valign="top">Either jar or classname</td>
+  </tr>
+  <tr>
+    <td valign="top">jar</td>
+    <td valign="top">the location of the jar file to execute (must have a Main-Class entry in the manifest). Fork must be set to true if this option is selected.</td>
+    <td align="center" valign="top">Either jar or classname</td>
   </tr>
   <tr>
     <td valign="top">args</td>