class Employee the class
static · one shared copy on the class
Employee.company "Acme"
one box, shared by every employee
Employee.headcount 0
static method · changes the shared box
↑ changes Employee.company for all employees at once
instance fields · one copy per object
name
salary
Employees 0 live ← each has its own name & salary
console
▸ Give one employee a raise — only their salary box changes. Rebrand the company — the one shared static box updates and every card reflects it.