src/java.base/share/classes/java/net/ContentHandler.java

@@ -82,10 +82,15 @@
  * @since   1.0
  */
 public abstract class ContentHandler {
 
     /**
+     * Constructor for subclasses to call.
+     */
+    public ContentHandler() {}
+
+    /**
      * Given a URL connect stream positioned at the beginning of the
      * representation of an object, this method reads that stream and
      * creates an object from it.
      *
      * @param      urlc   a URL connection.