Added support for ZCOUNT

src/main/java/redis/clients/jedis/Client.java

@@ -435,4 +435,8 @@ public class Client extends Connection {
     public void punsubscribe(String... patterns) {
 	sendCommand("PUNSUBSCRIBE", patterns);
     }
+
+    public void zcount(String key, double min, double max) {
+	sendCommand("ZCOUNT", key, String.valueOf(min), String.valueOf(max));
+    }
 }

src/main/java/redis/clients/jedis/Jedis.java

@@ -545,4 +545,9 @@ public class Jedis {
     public void psubscribe(JedisPubSub jedisPubSub, String... patterns) {
 	jedisPubSub.proceedWithPatterns(client, patterns);
     }
+
+    public int zcount(String key, double min, double max) {
+	client.zcount(key, min, max);
+	return client.getIntegerReply();
+    }
 }

src/test/java/redis/clients/jedis/tests/commands/SortedSetCommandsTest.java

@@ -180,4 +180,16 @@ public class SortedSetCommandsTest extends JedisCommandTestBase {
 	score = jedis.zscore("foo", "c");
 	assertEquals(0.1d, score);
     }
+
+    @Test
+    public void zcount() {
+	jedis.zadd("foo", 1d, "a");
+	jedis.zadd("foo", 10d, "b");
+	jedis.zadd("foo", 0.1d, "c");
+	jedis.zadd("foo", 2d, "a");
+
+	int result = jedis.zcount("foo", 0.01d, 2.1d);
+
+	assertEquals(2, result);
+    }
 }