Added Java code snippet for bitmap (#3687)

* Add bitmap example

* Change class name

* Add assert for res3 and res4

* Update BitMapsExample.java

* Format spaces in BitMapsExample.java

---------

Co-authored-by: Ranjeet Singh <[email protected]>
Co-authored-by: M Sazzadul Hoque <[email protected]>

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

@@ -0,0 +1,47 @@
+// EXAMPLE: bitmap_tutorial
+// HIDE_START
+package io.redis.examples;
+
+import org.junit.Assert;
+import org.junit.Test;
+import redis.clients.jedis.UnifiedJedis;
+
+public class BitMapsExample {
+
+    @Test
+    public void run() {
+        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
+        // HIDE_END
+
+        // REMOVE_START
+        jedis.del("pings:2024-01-01-00:00");
+        // REMOVE_END
+
+
+        // STEP_START ping
+        boolean res1 = jedis.setbit("pings:2024-01-01-00:00", 123, true);
+        System.out.println(res1); // >>> false
+
+        boolean res2 = jedis.getbit("pings:2024-01-01-00:00", 123);
+        System.out.println(res2); // >>> true
+
+        boolean res3 = jedis.getbit("pings:2024-01-01-00:00", 456);
+        System.out.println(res3); // >>> false
+        // STEP_END
+
+        // REMOVE_START
+        Assert.assertFalse(res1);
+        Assert.assertTrue(res2);
+        Assert.assertFalse(res3);
+        // REMOVE_END
+
+        // STEP_START bitcount
+        long res4 = jedis.bitcount("pings:2024-01-01-00:00");
+        System.out.println(res4); // >>> 1
+        // STEP_END
+
+        // REMOVE_START
+        Assert.assertEquals(res4, 1);
+        // REMOVE_END
+    }
+}