Using keySet() method then changing the Set to a String Array? Java

Question

So this should be really simple since I know it's possible (I just don't understand 'Set' very much). So basically there is this TreeMap, let's call it aTree. So I need to do something like: ``` somethingHereProbably = aTree.keySet(); somethingHereProbably.toStringArray(); ```

Accepted Answer

You can do

```
Map<String, Object> map = ...
String[] strings = map.keySet().toArray(new String[map.size()]);
```

This works for any kind of map, including TreeMap

Using keySet() method then changing the Set to a String Array? Java

Solution

Problem