What is the difference between class and object?
A class is a group of similar objects. Object is a real-world entity such as book, car, etc. Class is a logical entity. Object is a physical entity.
What is object class in Scala?
An object is a class that has exactly one instance. It is created lazily when it is referenced, like a lazy val. As a top-level value, an object is a singleton. As a member of an enclosing class or as a local value, it behaves exactly like a lazy val.
Why object is used in Scala?
Most often, you need an object to hold methods and values/variables that shall be available without having to first instantiate an instance of some class. This use is closely related to static members in Java.
What are classes in Scala?
Classes in Scala are blueprints for creating objects. They can contain methods, values, variables, types, objects, traits, and classes which are collectively called members. Types, objects, and traits will be covered later in the tour.
What is the difference between object and class explain with example?
Class is a blueprint or template from which objects are created. Object is a real world entity such as pen, laptop, mobile, bed, keyboard, mouse, chair etc. Class is a group of similar objects.
What is class and object with example?
Object − Objects have states and behaviors. Example: A dog has states – color, name, breed as well as behaviors – wagging the tail, barking, eating. An object is an instance of a class. Class − A class can be defined as a template/blueprint that describes the behavior/state that the object of its type support.
What is an object class?
The Object class defines the basic state and behavior that all objects must have, such as the ability to compare oneself to another object, to convert to a string, to wait on a condition variable, to notify other objects that a condition variable has changed, and to return the object’s class.
Is object in Scala singleton?
Scala Singleton Object In scala, there is no static concept. So scala creates a singleton object to provide entry point for your program execution. If you don’t create singleton object, your code will compile successfully but will not produce any output.
What is difference between class and object in OOP?
A class is a template for creating objects in program whereas the object is an instance of a class. A class is a logical entity while object is a physical entity. A class does not allocate memory space on the other hand object allocates memory space.
What is difference between object and instance?
In simple words, Instance refers to the copy of the object at a particular time whereas object refers to the memory address of the class.
What is a object example?
An object is an entity having a specific identity, specific characteristics and specific behavior. Taking a car as an example of an object, it has characteristics like colour, model, version, registration number, etc. It has behaviours like start the engine, stop the engine, accelerate the car, apply the brakes, etc.
What is object in OOP?
In object-oriented programming (OOP), objects are the things you think about first in designing a program and they are also the units of code that are eventually derived from the process. Each object is an instance of a particular class or subclass with the class’s own methods or procedures and data variables.