r/learnjava • u/jadu2115 • 12d 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/Fuzzy-System8568 12d ago
  • Dev need define "person"
  • Dev need define person's stuff
  • Person have name, age, address
  • Dev have to write person stuff for each new person
  • Dev lose track after making "personAge322"
  • Dev wish dev could collect stuff together
  • Dev make "Person" object.
  • Now dev only need Person personOne = new Person("Steve", 21, "Address for steve")
  • Dev can now call personOne.getName
  • Dev happy

Any questions?

18

u/desmoteo 12d ago

All correct except 'Dev happy'.

Dev is always frustrated.

5

u/rcdchu74 12d ago

You’ve made me read ‘person’ too many times, it doesn’t look like a word anymore lol

1

u/DiligentMission6851 12d ago

It be like that sometimes 

2

u/RetroSSJ21 12d ago

Code monkey get up get coffee

1

u/thisisjustascreename 12d ago

Dev also need able to make person get older.

Dev create method public void handleBirthday() { this.age++; }

Now every approximately 365.2475 days Steve get older.