Added example for topK

src/test/java/io/redis/examples/TopKExample.java

@@ -0,0 +1,47 @@
+//EXAMPLE: topk_tutorial
+//HIDE_START
+package io.redis.examples;
+//HIDE_END
+
+//REMOVE_START
+import org.junit.Test;
+import redis.clients.jedis.UnifiedJedis;
+
+import java.util.List;
+//REMOVE_END
+
+public class TopKExample {
+    @Test
+    public void run(){
+        //HIDE_START
+        UnifiedJedis unifiedJedis = new UnifiedJedis("redis://127.0.0.1:6379");
+        //HIDE_END
+
+        //REMOVE_START
+        unifiedJedis.del("bikes:keywords");
+        //REMOVE_END
+
+        //STEP_START topk
+        String res1 = unifiedJedis.topkReserve("bikes:keywords", 5L, 2000L, 7L, 0.925D);
+        System.out.println(res1); // >>> True
+
+        List<String> res2 = unifiedJedis.topkAdd("bikes:keywords",
+                "store",
+                "seat",
+                "handlebars",
+                "handles",
+                "pedals",
+                "tires",
+                "store",
+                "seat");
+
+        System.out.println(res2); // >>> [None, None, None, None, None, 'handlebars', None, None]
+
+        List<String> res3 = unifiedJedis.topkList("bikes:keywords");
+        System.out.println(res3); // >>> ['store', 'seat', 'pedals', 'tires', 'handles']
+
+        List<Boolean> res4 = unifiedJedis.topkQuery("bikes:keywords", "store", "handlebars");
+        System.out.println(res4); // >>> [1, 0]
+        //STEP_END
+    }
+}