merge with new example

Author: hhbyyh

examples/src/main/java/org/apache/spark/examples/mllib/JavaLDAExample.java

@@ -58,7 +58,7 @@ public Tuple2<Long, Vector> call(Tuple2<Vector, Long> doc_id) {
     corpus.cache();
 
     // Cluster the documents into three topics using LDA
-    DistributedLDAModel ldaModel = new LDA().setK(3).run(corpus);
+    DistributedLDAModel ldaModel = (DistributedLDAModel) new LDA().setK(3).run(corpus);
 
     // Output topics. Each is a distribution over words (matching word count vectors)
     System.out.println("Learned topics (as distributions over vocab of " + ldaModel.vocabSize()