How to set up Eclipse properly, haven't worked in a long time?

Question

Java

More than six months ago, I wrote the programs I needed in Eclipse.
After I stopped, I uninstalled Eclipse.
Now put.
First, WindowBuilder is gone.
I installed it, of course.
Why was it removed from the standard delivery?
Can it be downloaded offline? I have to change computers, and then reconfigure the IDE, but the Internet is bad.
Secondly, how to build .jar with libs?
Before, I pressed some buttons, he was going to.
Thirdly, how to make an Ant project?
In NetBeans, it is created right away.
How about in Eclipse?

Answer 1

First, WindowBuilder is gone.
I installed it, of course.
Why was it removed from the standard delivery?

I don't know the exact reasons, but Swing has been deprecated and replaced by JavaFX a long time ago.
I don't think anything has really changed here.
Project -> Export -> Runnable JAR file (or just JAR file) -> "Package required libraries into generated JAR" checkbox -> Finish