Bump Javadoc reference to Java 7.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/batik/trunk@1869321 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/build.xml b/build.xml
index d21a302..cee5f0b 100644
--- a/build.xml
+++ b/build.xml
@@ -118,7 +118,7 @@
     <property name="class-prefix"       value="org.apache.${project}"/>
   
     <property name="dom.javadoc"        value="http://www.w3.org/2003/01/dom2-javadoc/"/>
-    <property name="jdk.javadoc"        value="http://docs.oracle.com/javase/6/docs/api/"/>
+    <property name="jdk.javadoc"        value="http://docs.oracle.com/javase/7/docs/api/"/>
     <property name="rhino.javadoc"      value="http://www.mozilla.org/rhino/apidocs/"/>
   
     <property name="site"               value="site"/>