Removing all Items from a combo box in Java

Question

I need to remove all items from the combo box

int itemCount = combo.getItemCount();

for(int i = 0; i < itemCount; i++){
  combo.removeItemAt(0);
}

This code will remove all items except the last one. It gives a NullPointerException. How to fix that?

Answer 1

The code in the question would normally work. However, it looks like a threading issue. Another thread may be messing with the items.

However, I sugeest you should better use the removeAllItems(); method:

combo.removeAllItems();