Add shakespeare sample for BigQuery.

For using veneer at
https://cloud.google.com/bigquery/create-simple-app-api

bigquery/cloud-client/README.md

@@ -31,3 +31,11 @@ You can then run a given `ClassName` via:
     mvn exec:java -Dexec.mainClass=com.example.bigquery.SyncQuerySample \
         -Dquery='SELECT corpus FROM `publicdata.samples.shakespeare` GROUP BY corpus;' \
         -DuseLegacySql=false
+
+### Running the simple app example
+
+To run the example from the [simple app example
+documentation](https://cloud.google.com/bigquery/create-simple-app-api):
+
+    mvn exec:java -Dexec.mainClass=com.example.bigquery.SimpleApp
+

bigquery/cloud-client/src/main/java/com/example/bigquery/SimpleApp.java

@@ -0,0 +1,80 @@
+/*
+  Copyright 2016, Google, Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+package com.example.bigquery;
+
+// [START all]
+// [START create_client]
+import com.google.cloud.bigquery.BigQuery;
+import com.google.cloud.bigquery.BigQueryOptions;
+import com.google.cloud.bigquery.FieldValue;
+import com.google.cloud.bigquery.QueryRequest;
+import com.google.cloud.bigquery.QueryResponse;
+import com.google.cloud.bigquery.QueryResult;
+
+import java.util.Iterator;
+import java.util.List;
+// [END create_client]
+
+public class SimpleApp {
+  public static void main(String... args) throws Exception {
+    // [START create_client]
+    BigQuery bigquery = BigQueryOptions.defaultInstance().service();
+    // [END create_client]
+    // [START run_query]
+    QueryRequest queryRequest =
+        QueryRequest
+            .builder(
+                "SELECT "
+                    + "APPROX_TOP_COUNT(corpus, 10) as title, "
+                    + "COUNT(*) as unique_words "
+                    + "FROM `publicdata.samples.shakespeare`;")
+            // Use standard SQL syntax for queries.
+            // See: https://cloud.google.com/bigquery/sql-reference/
+            .useLegacySql(false)
+            .build();
+    QueryResponse response = bigquery.query(queryRequest);
+    // [END run_query]
+
+    // [START print_results]
+    QueryResult result = response.result();
+
+    while (result != null) {
+      Iterator<List<FieldValue>> iter = result.iterateAll();
+
+      while (iter.hasNext()) {
+        List<FieldValue> row = iter.next();
+        List<FieldValue> titles = row.get(0).repeatedValue();
+        System.out.println("titles:");
+
+        for (FieldValue titleValue : titles) {
+          List<FieldValue> titleRecord = titleValue.recordValue();
+          String title = titleRecord.get(0).stringValue();
+          long uniqueWords = titleRecord.get(1).longValue();
+          System.out.printf("\t%s: %d\n", title, uniqueWords);
+        }
+
+        long uniqueWords = row.get(1).longValue();
+        System.out.printf("total unique words: %d\n", uniqueWords);
+      }
+
+      result = result.nextPage();
+    }
+    // [END print_results]
+  }
+}
+// [END all]
+

bigquery/cloud-client/src/test/java/com/example/bigquery/SimpleAppIT.java

@@ -0,0 +1,57 @@
+/*
+  Copyright 2016, Google, Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+package com.example.bigquery;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+/**
+ * Tests for simple app sample.
+ */
+@RunWith(JUnit4.class)
+@SuppressWarnings("checkstyle:abbreviationaswordinname")
+public class SimpleAppIT {
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  @Before
+  public void setUp() {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.setOut(null);
+  }
+
+  @Test
+  public void testQuickstart() throws Exception {
+    SimpleApp.main();
+    String got = bout.toString();
+    assertThat(got).contains("hamlet");
+  }
+}