An object is a basic unit of object-oriented programming and represents a real-life entity. A typical Java program creates many objects, which interact each other by invoking methods. An object consists of
- State, which is represented by attributes of an object, and also reflects the properties of an object.
- Behavior, which is represented by methods of an object, and also reflects the response of an object with other objects.
- Identity, which gives a unique name to an object and enables one object to interact with other objects.
Objects correspond to things found in the real world.
For example, a graphics program may have objects such as circle, square, and menu.
An online shopping system might have objects such as shoppingCart, customer, and product.
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