r/learnjava • u/jadu2115 • 14d ago

Java Beginners: What Is an Object Actually?

I'm a Java learner and I've been learning Java for the past few months, but I still don't truly understand what an object actually is.

I've watched several YouTube videos and used AI tools to understand it, but I keep getting the same explanation: "An object is nothing but data + code."

I understand the definition, but I still can't visualize or feel what an object actually is when I'm writing Java code.

Could someone explain it in a simple, practical way, preferably with a real world analogy and a small Java example?

I feel like I'm missing one fundamental concept here. Any explanation would be really helpful. Thanks!

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u/Ok_For_Free 14d ago

When you are writing a class, you are defining a template. The template can describe fields and methods.

When you new a class, you are creating an object instance that has the fields and methods defined in the class/template.

The main way to use objects is when you need to create lots of them, all described by the same class/template.

This means there is only one class/template with that namespace+name. In some cases you might want to put a field or method on the template instead of the object, and that is what the static modifier does.

Because everything in Java is an object, except for primitives, you'll encounter times where you'll define a class that you'll only need one instance of. This is normal, especially as you start to use dependency injection systems.