Better parameter names

src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java

@@ -327,15 +327,15 @@ public class CollatingIterator<E> implements Iterator<E> {
      *
      * @return {@code false} iff there was no value to set
      */
-    private boolean set(final int i) {
-        final Iterator<? extends E> it = iterators.get(i);
+    private boolean set(final int index) {
+        final Iterator<? extends E> it = iterators.get(index);
         if (it.hasNext()) {
-            values.set(i, it.next());
-            valueSet.set(i);
+            values.set(index, it.next());
+            valueSet.set(index);
             return true;
         }
-        values.set(i, null);
-        valueSet.clear(i);
+        values.set(index, null);
+        valueSet.clear(index);
         return false;
     }
 

src/main/java/org/apache/commons/collections4/iterators/FilterListIterator.java

@@ -193,11 +193,11 @@ public class FilterListIterator<E> implements ListIterator<E> {
 
     /**
      * Not supported.
-     * @param o the element with which to replace the last element returned by
+     * @param ignored the element with which to replace the last element returned by
      *          {@code next} or {@code previous}
      */
     @Override
-    public void set(final E o) {
+    public void set(final E ignored) {
         throw new UnsupportedOperationException("FilterListIterator.set(Object) is not supported.");
     }
 

src/main/java/org/apache/commons/collections4/iterators/ObjectArrayListIterator.java

@@ -189,7 +189,6 @@ public class ObjectArrayListIterator<E> extends ObjectArrayIterator<E>
         if (lastItemIndex == -1) {
             throw new IllegalStateException("must call next() or previous() before a call to set()");
         }
-
         array[lastItemIndex] = obj;
     }
 

src/main/java/org/apache/commons/collections4/iterators/SingletonListIterator.java

@@ -166,16 +166,16 @@ public class SingletonListIterator<E> implements ResettableListIterator<E> {
     /**
      * Sets sets the value of the singleton.
      *
-     * @param obj  the object to set
+     * @param object  the object to set
      * @throws IllegalStateException if {@code next} has not been called
      *          or the object has been removed
      */
     @Override
-    public void set(final E obj) {
+    public void set(final E object) {
         if (!nextCalled || removed) {
             throw new IllegalStateException();
         }
-        this.object = obj;
+        this.object = object;
     }
 
 }

src/main/java/org/apache/commons/collections4/iterators/UnmodifiableListIterator.java

@@ -117,7 +117,7 @@ public final class UnmodifiableListIterator<E> implements ListIterator<E>, Unmod
     }
 
     @Override
-    public void set(final E obj) {
+    public void set(final E ignored) {
         throw new UnsupportedOperationException("set() is not supported");
     }