Hello !!!

.gitignore

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+.idea
+pointer-nested-classes.iml
+README.md

src/Collections.java

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+public class Collections {
+    private static Integer[] integers;
+
+    public Collections(Integer[] integers){
+        Collections.integers = integers;
+
+    }
+    public firstToLastIterator directIterator() {
+        return new firstToLastIterator();
+    }
+
+    private static class firstToLastIterator implements Iterator {
+
+        private int currentIndex;
+
+        @Override
+        public boolean hasNext() {
+            return currentIndex < integers.length;
+        }
+
+        @Override
+        public Object next() {
+            if (currentIndex % 2 != 0) {
+                currentIndex++;
+                return 0;
+            } else {
+                return integers[currentIndex++];
+            }
+            System.out.println(Integer[] integers);
+        }
+    }
+
+        class lastToFirstIterator implements Iterator {
+        private int currentIndex = integers.length - 1;
+
+        @Override
+        public boolean hasNext() {
+            return currentIndex >= 0;
+        }
+
+        @Override
+        public Object next() {
+            int index = currentIndex;
+            currentIndex -= 2;
+            return integers[index];
+        }
+    }
+
+
+}

src/Iterator.java

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+public interface Iterator {
+     boolean hasNext();
+
+    Object next();
+
+}

src/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        Collections collections = new Collections(new Integer[]{10, 11, 12, 13, 14, 15, 16, 17});
+
+        Iterator iterator = new collections.directIterator();
+        display(iterator);
+    }
+
+
+    static void display(Iterator iterator) {
+        while (Iterator.hasNext()) {
+            System.out.println(iterator.next());
+        }
+    }
+}
+