Add files via upload

Author: AvinandanBose

NavigableMap14.java

@@ -0,0 +1,61 @@
+import java.util.NavigableMap;
+import java.util.TreeMap;
+import java.util.Iterator;
+
+public class NavigableMap14 {
+    // navigableKeySet
+    public static void main(String[] args) throws Exception {
+        NavigableMap<Float, Integer> map = new TreeMap<>();
+        map.put(1.8f, 11);
+        map.put(2.6f, 9);
+        map.put(3.4f, 78);
+        map.put(4.3f, 5);
+        map.put(5.6f, 1);
+        map.put(6.8f, 3);
+        System.out.println("Map:" + map);
+        System.out.println("navigableKeySet:" + map.navigableKeySet());
+
+        // Similar way of descendingKeySet , navigableKeySet supports all the methods of
+        // Set
+        System.out.println("navigableKeySet:" + map.navigableKeySet().pollFirst());
+        System.out.println("navigableKeySet:" + map.navigableKeySet().pollLast());
+        System.out.println("navigableKeySet:" + map.navigableKeySet().descendingSet());
+        System.out.println("navigableKeySet:" + map.navigableKeySet().headSet(3.4f));
+        System.out.println("navigableKeySet:" + map.navigableKeySet().tailSet(3.4f));
+        System.out.println("navigableKeySet:" + map.navigableKeySet().subSet(3.4f, 5.6f));
+        System.out.println("navigableKeySet:" + map.navigableKeySet().subSet(3.4f, true, 5.6f, true));
+        System.out.println("navigableKeySet:" + map.navigableKeySet().subSet(3.4f, false, 5.6f, false));
+
+        // Iterator
+        Iterator<Float> iterator = map.navigableKeySet().iterator();
+        while (iterator.hasNext()) {
+            System.out.println("Iterator:" + iterator.next());
+        }
+
+        // remove
+        map.navigableKeySet().remove(3.4f);
+        System.out.println("Map:" + map);
+
+        // removeAll
+        map.navigableKeySet().removeAll(map.navigableKeySet().subSet(4.3f, 5.6f));
+        System.out.println("Map:" + map);
+        // retainAll
+        map.navigableKeySet().retainAll(map.navigableKeySet().subSet(2.6f, 5.6f));
+        System.out.println("Map:" + map);
+        // clear
+        map.navigableKeySet().clear();
+        System.out.println("Map:" + map);
+
+        // ...and so on
+        // Except it doesnot Support add() method and addAll() method
+        /*
+         * Not Supported
+         * ---------------
+         * System.out.println("Descending Key Set:" + map.navigableKeySet().add(1.8f));
+         * System.out.println("Descending Key Set:" + map.navigableKeySet().addAll(map.descendingKeySet()));
+         * 
+         */
+
+    }
+
+}