Threading Problem

[willemien]

I have a program that has some thread's and now have problems

One thread (the main thread) keeps adding strings to a TreeMap. (at a quite high rate)
(with map.put(string1,string2);

Another thread (started by pressing a button in a Gui) wants to copy that Tree map to an array.

(with array = map.values().toArray(new String[0]);)

and this never seems to happen, I guess because the main thread keeps adding strings.
map should stay a treeMap because i want to have the array sorted. (and as far as I understand hashmaps don't do that)

what is an easy and safe way to temporarely interrupt the main thread ?

[Norm]

Look at using synchronized methods to do the add and the copy.

http://docs.oracle.com/javase/tutori.../syncmeth.html

[willemien]

tried that

synchronised the add and the getArray methods in the class that contains the map but it doesn't seem to work :(

I even tried synchronising the map with

private final Map<String, String> map = Collections.synchronizedSortedMap(new TreeMap<String,String>());
but it still It just won't work

Curiuosly i use the routine that makes an array from the map also in the main thread and in that thread it works fine.

[Fubarable]

It's hard to know what's not working without seeing your code, preferably a small compilable runnable program that shows your problem for us, an SSCCE.

[willemien]

I t looks like i was not really paying attention to my program, did some refactoring and now it works. (think the problem was a testroutine that stopped the thread and because other threads kept running i didn't notice it

made the methods synchronized (and converted them from class to instance methods) and now all seems to work fine :)

Thanks for your help :)