I have 2 doubts about java in the ide netbeans:
As it is called or you need to know to create a function in java that allows you to add x items in a combobox of a project already compiled, so you are not opening the project and adding a new item and having to recompile it. project again.
I think I have an answer for that. I think it could be done by creating a table in my database in the workbrench mysql and there, adding fields already by default and that a column is loaded in the combobox, and if you want to add an item or more items, you would only do one insert to that table from another form and the added item would be saved every time it is entered.
Another doubt that I have and I've always wanted to do it and I've researched a bit but I can not find any information on how to make a system, where they are connected to each other using the internet and the data recorded from that system it is reflected in all the machines that are using it in real time.