What does this Java main() method represent?

Question

The main() method in the following Java program is a text rebus. What does it represent?

import java.util.*;
import java.awt.geom.*;

public class WhatDoesMainRepresent {
    private static HashSet<Obj> hashSet = new HashSet<Obj>();
    private static AffineTransform e = new AffineTransform();

    static {
        hashSet.add(new Obj());
    }

    public static void main(String[] args) {
        hashSet.add(new Obj());
        e.rotate(Math.PI);
        {}
    }

    private static class Obj {
        public int hashCode() {
            return 1;
        }
    }
}

Hints:

1. The AffineTransform object is named e for a reason.
2. The hashSet.add(new Obj()) line in the main() method represents a single word that is a verb. (So far that word has not been mentioned.)

Answer 1

It represents

Kaleidoscope

Reasoning:

The second add will have the object "collide" with the first on the hashset since they have the same hash code. e rotated 180 degees is "a". The empty curly braces are a new "scope". Collide+a+scope = kaleidoscope.

Answer 2

I shame myself with this guess if it turns out to be wrong, but I suspect the text is the idiom

been around the block once or twice

The reasoning being:

Every key/value pair in a hash map is stored in a bin determined by its hash code. In this case the hashcode for all objects of the Obj class is identical, meaning such objects are stored in the same bin.

The e.rotate(Math.PI) statement performs a useless 180° inversion. The transform will therefore turn its operand around. The {} represents an empty block.

The static statement and initial statement in main adds an object to the same bin once and then twice.

Hence: bin around the block once or twice.

After typing this out, I realize how indescribably bad this pun is. I truly hope this isn't the correct answer. :P

Answer 3

I think the answer is:

Love story

Reasoning:

hashSet.add(new Obj());

Here an object is being stored in a hash set [STORE]

e.rotate(Math.PI);

Here the object e is having a 180 degree rotation applied [E ABOUT]

{}

This is an empty block, so this code does nothing, or love as nothing can be termed in tennis for example [LOVE]

So putting it together we have:

STORE E ABOUT LOVE i.e. STORY ABOUT LOVE or LOVE STORY

Answer 4

Is it

Much Ado About Nothing

Building quite heavily COTO's answer:

There's much code before the main(), but then it adds (sounds vaguely like "Ado") one more element, a new Obj object, to the collection, so it doesn't have none or one, but rather, much content.

The e.rotate(Math.PI) being "about".

And the empty code block {} being "Nothing".

Answer 5

I don't think this is what you're after, but it could look like part of one school of thought for the perfect barbecue:

add another one (second distinct Obj object: 'another', hashCode: 'one') to the block (static initialiser: 'block', also HashSet: reference to barbecue grids or the deliberate style of burn marks on the meat after cooking), turn it over once at the natural point, i.e. half way through cooking (e: base of natural logs, rotate by $\pi$: turn around), then just let it sit i.e. do nothing until it is done (empty brace = nop: do nothing , end of main(): 'done').