It is unclear from the code snippet (what are tempSongs, songs_hm, on what i iterates?).
But basically, you have to be careful when modifying the collection on which you iterate, particularly for remove().
HashMap iterator: it depends on what you want to iterate. You can get iterators on keys, values or both.

I was hoping the code snippet was enough. I was able to solve the problem by handling the thing i wanted to do in a later state.

hello,

i think it's because you loop over an iterator of a hashmap, but you at the same time modify this very same hashmap. this logically confuses the iterator as it noticed elements were added/removed.

try iterating of over the iterator and storing the list of key in an array/list/set of strings. then loop over this collection of keys you just created and delete/add content into your original map. this should solve the problem.


henri

thanks, that should have worked