diff --git a/budd-common/src/main/java/io/github/ehlxr/MyBloomFilter.java b/budd-common/src/main/java/io/github/ehlxr/util/MyBloomFilter.java
similarity index 99%
rename from budd-common/src/main/java/io/github/ehlxr/MyBloomFilter.java
rename to budd-common/src/main/java/io/github/ehlxr/util/MyBloomFilter.java
index 47031e4..ae50a21 100644
--- a/budd-common/src/main/java/io/github/ehlxr/MyBloomFilter.java
+++ b/budd-common/src/main/java/io/github/ehlxr/util/MyBloomFilter.java
@@ -22,7 +22,7 @@
  * THE SOFTWARE.
  */
 
-package io.github.ehlxr;
+package io.github.ehlxr.util;
 
 import java.util.BitSet;
 
diff --git a/budd-demo/src/main/java/io/github/ehlxr/Main.java b/budd-demo/src/main/java/io/github/ehlxr/Main.java
index 5bb1b37..b2a7995 100644
--- a/budd-demo/src/main/java/io/github/ehlxr/Main.java
+++ b/budd-demo/src/main/java/io/github/ehlxr/Main.java
@@ -36,6 +36,7 @@ public class Main {
                 { 9, 10, 11, 12 }
         };
         System.out.println(ns.length); // 3
-        System.out.println(ns[0][2]);
+        System.out.println(ns[0].length); // 4
+        System.out.println(ns[2][2]); // 11
     }
 }