Welcome to the forum! Please read this topic
to learn how to post code in code or highlight tags and other useful info for new members.
If you still need help, please type out your questions one at a time or logically grouped by topic, if you're concerned about length.
If your questions are primarily about Eclipse's WindowBuilder, there aren't many here who use it and who are good at it. Ultimately, the graphical GUI programming tools require the programmer to understand the generated code. and once one understands the generated code, the GUI tool becomes unnecessary.