Java async MySQL queries

First of all, I don’t have much experience with thread safe programming. I have a MySQL class, and I want to use one instance in multiple threads to prevent blocking code in the main thread. I read …

Does adding “synchronized” affect method overriding?

my problem is that: search_text.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { ArrayList GPDMvalue = (ArrayList&…