How to Loop in NavigableMap in Java

Question

Is there any way to loop in NavigableMap in Java? I want to access all of item in NavigableMap.

Answer 1

The same way you would loop any collection, with an iterator or for-each loop.

NavigableMap<K, V> map = ...

for(K key: map.keySet()) // iterate keys.

for(V value: map.values()) // iterate values.

for(Entry<K, V> entry: map.entrySet()) // iterate key/value entries.

Answer 2

A NavigableMap is a Map . You get all its keys using keySet() , all its values using values() , and all its entries using entrySet() .

Answer 3

Since NavigableMap extends Map it should still provide the methods values() , keySet() and entrySet() . Use those to iterate over the entries/values/keys as you'd do with any other map.

Answer 4

Correct advance looping for Map should like this->

for(Map.Entry entry: map.entrySet()) // iterate key/value entries.

Answer 5

If you only to get all of the items, I think you don't need use loop,just print these.

NavigableMap<String, Integer> nav = new TreeMap<String, Integer>();
nav.put("key1", value1);
nav.put("key2", value2);
nav.put("key3", value3);
System.out.printf("The Whole:%s", nav);