In Java, an object is a real-world entity that has state and behavior. It is an instance of a class. Everything in Java is associated with classes and objects, and objects represent physical or logical entities in a program.
Key Points:
1.State (Attributes/Properties): The data or characteristics of the object, stored in fields/variables.
2.Behavior (Methods): What an object can do, represented by methods/functions.
3.Identity: Each object has a unique identity, even if its state is identical to another object.
Think of a class as a blueprint, and objects as instances built from that blueprint.
Left Side: Class (Blueprint)
The left panel is labeled "Class (Blueprint)".
Inside, it shows a Car class with:
Attributes (State): color, model, year — these represent the data/properties of the class.
Methods (Behavior): start(), stop() — these represent the actions the class can perform.
Right Side: Objects (Instances)
The right panel is labeled "Objects (Instances)".
Two objects are shown: myCar and yourCar.
myCar: Red, Toyota, 2026
yourCar: Blue, Honda, 2024
Each object has:
State: Its specific attributes (color, model, year)
Behavior: Methods from the class (start(), stop()) that it can use
This shows that objects are individual instances of the class with their own data.
Top comments (0)