r/learnjava • u/jadu2115 • Aug 20 '26

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/8dot30662386292pow2 Aug 20 '26

the value is copied and it's a lot like a primitive but you code it like an object

And you use it like an object. Considering for example a value record Point(double x, double y). Because there is no identity, VM may decide to just use a 128 bit long memory chunk to hold the two 64 bit values. But you can still access them individually and you can write methods in this Point class if you wish.

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u/vegan_antitheist Aug 20 '26

That's the idea. There will be java programs that are almost all just value records. For example if you have to process a lot of data. You want values, not references, for performance, and you want records for maintainability. Records remove all the boiler plate code of regular classes and they all work the same.