style changes

src/main/java/org/apache/datasketches/filters/quotientfilter/Filter.java

@@ -99,7 +99,7 @@ long get_hash(long input) {
         return XxHash.hashLong(input, 0L) ; // CD edit for datasketches hash function using same seed.
     }
 
-    public long get_space_use() { return 0 ; }
+    public long getSpaceUse() { return 0 ; }
 //    public int get_bits_per_entry() { return 0 ; }
 //
 //    public abstract long get_num_entries(boolean include_all_internal_filters);

src/main/java/org/apache/datasketches/filters/quotientfilter/Iterator.java

@@ -49,22 +49,22 @@ void clear() {
 
     boolean next() {
 
-        if (index == qf.get_num_slots()) {
+        if (index == qf.getNumSlots()) {
             return false;
         }
 
-        long slot = qf.get_slot(index);
+        long slot = qf.getSlot(index);
         boolean occupied = (slot & 1) != 0;
         boolean continuation = (slot & 2) != 0;
         boolean shifted = (slot & 4) != 0;
 
 
-        while (!occupied && !continuation && !shifted && index < qf.get_num_slots()) {
+        while (!occupied && !continuation && !shifted && index < qf.getNumSlots()) {
             index++;
-            if (index == qf.get_num_slots()) {
+            if (index == qf.getNumSlots()) {
                 return false;
             }
-            slot = qf.get_slot(index);
+            slot = qf.getSlot(index);
             occupied = (slot & 1) != 0;
             continuation = (slot & 2) != 0;
             shifted = (slot & 4) != 0;