This week's giveaway is in the Java/Jakarta EE forum. We're giving away four copies of Java EE 8 High Performance and have Romain Manni-Bucau on-line! See You can have objects (reference types) as fields. You initialise them (probably in your constructor) and then your methods can call methods on those objects.
you should be getting right out of the main method. Use the main method to start your application, then get into other methods.
I RELEASE YOU! (for now .... ) Feel free to peruse this tiny ad: