I'm the opposite; never made a Java program yet! :PI see you come from a Java world.
You don't need all the "this.", "private", or "System.out." stuff, Processing simplified this...
However, is it true I'd have to use this all the time when programming in Java?
I thought this would only be necessary to differentiate a local variable from a field variable.
Or even a child's method from its parent's method (super).
And also when needed to pass a class instance's reference to an external method or constructor.
Since a sketch class extends Processing's PApplet, and our own classes are inner ones,
we can use all of Processing's API functions w/o any extra verbose!