Hello Friends.I have some problem for developing java server -side softwears

I want to ask about something that I downloaded apache-tomcat,openjdk-15,and also eclipse ide on my Ubuntu (focal fossa).Do I need to download java ee SDK for my web development???I saw that Oracle Linsence is changed so java ee SDK(jarkarta ee) is not open source anymore.Plz give me some idea if I need to download.