Customers Don’t Build Cars. Developers Shouldn’t Build Objects.

You Don’t Order a Car Engine. You Order a Car.

When you go to buy a car, you don’t say:

Give me a V8 engine, four doors, ABS brakes, and leather seats.

You say:

I want a Sedan.

Or:

I want an SUV.

And the factory handles the rest.

That’s the Factory Pattern.

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The Real-Life Problem

Imagine if buying a car worked like this:

new Engine();
new Wheels();
new Brakes();
new Seats();

Every customer would need to understand:

• Engine types
• Safety systems
• Assembly rules

That would be chaos.This is exactly what happens in software when business code creates objects directly.

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What the Factory Actually Does

A car factory hides complexity.

You ask for:

• Sedan
• SUV
• Hatchback

The factory decides:

• Which engine to use
• How many parts are needed
• How everything fits together

You get a ready-to-use product.

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Factory Pattern in One Sentence

Client asks for a type. Factory returns a ready object. Client never uses new.
That’s it.

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Why Your Brain Remembers This?

Because the rule is simple:

• Customers don’t build cars
• Developers shouldn’t build objects Both ask a factory.

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The One Line You’ll Never Forget

If users choose products, use a Factory.

Final Thought

Singleton answers:

How many objects should exist?

Factory answers:

Which object should I give you?

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Once you see the car factory, you’ll never forget the Factory Pattern again.