Style Guide

Tabs are fine for indentation
One space after keywords like if

if (condition)

One space (no newline) between brace and bracket

int method() {

Name variables in snake_case because they're easier to read

int some_variable;

Name constants with ALL_CAPS

final int SOME_CONSTANT;

Additionally, use the constants that are in ALL_CAPS if you have a choice

color = Color.WHITE;

Name methods in camelCase

void someMethod()

Name classes in CamelCase as well, but with first letter capitalized

class SomeClass

Spaces between math operators + * - / << >> & |, but no extra spaces with [] () <> brackets Also, use the parent interface when inializing things like lists or sets, and don't use explicit type arguments

array[i] = method((i * 1337 + 420) / 69 - 12);
List<String> string_list = new ArrayList<>();

Dont declare arrays C-style

int[] a = new int[4];

(not int a[] = new int[4];)

When declaring an array literal, place a space between the square bracket and first curly brace, but not inside the curly braces

method(new int[] {1, 2, 3});

Use key bindings, not KeyListeners

getInputMap().put(/* key */, "action");
getActionMap().put("action", new AbstractAction() { ... };