There are things that have been committed.

bloom_filters/src/bloom_filters/Main.java

@@ -1,5 +1,6 @@
 package bloom_filters;
 
+import java.util.Random;
 import tester.Tester;
 
 class BitVec {
@@ -23,7 +24,16 @@ class BitVec {
 }
 
 class Hash {
-    static
+    // Create k hash functions.
+    static int[] hash(Object o, int k, int m) {
+        Random rand = new Random(o.hashCode());
+
+        int[] ret = new int[k];
+
+        for (int i = 0; i < k; i++) ret[i] = rand.nextInt(m);
+
+        return ret;
+    }
 }
 
 class Examples {