Can we access instance variable in another class?

You can only access instance variables by using the class object.

Can a class have a private member variable that is an instance of another class?

Any instance of the class can access private variables of all other instances of the same class.

What do the instance variables represent what are the types of those instance variables?

Instance variables belong to an object and each object has its own copy of instance variables. Thus, they represent the state of an object. Similar to instance(or class) variables, there may also be methods that are defined inside a class. They are called class methods or instance methods.

What is the importance of instance variable in a class?

An instance variable is a variable which is declared in a class but outside of constructors, methods, or blocks. Instance variables are created when an object is instantiated, and are accessible to all the constructors, methods, or blocks in the class. Access modifiers can be given to the instance variable.

How do you use a variable from one class in another class?

You can create the object of one class and using this object you call other class variables and methods, but make sure the accessiblity will be as public. We can use interface class A and by implementing A into B, can use the variable of class A into B.

How do we access instance variables if they are private?

Instance variables can be accessed directly by calling the variable name inside the class. However, within static methods (when instance variables are given accessibility), they should be called using the fully qualified name.

Are attributes and instance variables the same?

Instance variables have scope only within a particular class/object and are always assosiated with a particular class. Attributes are meant to be used as messages on a notice board so that classes the have access to a particular request, page, session or application can usethem.

What do instance variables belong to?

Instance variables belong to an instance of a class. It means instance variables belong to an object and we know that an object is an instance of a class. Every object has it’s own copy of the instance variables.

How is an instance variable different from a local variable?

The main difference between instance variable and local variable is that instance variable is a variable that is declared in a class but outside a method, while a local variable is a variable declared within a method or a constructor. Moreover, a variable is a memory location to store data in these programs.

What is the difference between class variables and instance variables?

Class variables also known as static variables are declared with the static keyword in a class, but outside a method, constructor or a block. Instance variables are created when an object is created with the use of the keyword ‘new’ and destroyed when the object is destroyed.

What are instance variables in a class blueprint?

Class Variables. When a number of objects are created from the same class blueprint, they each have their own distinct copies of instance variables. In the case of the Bicycle class, the instance variables are cadence, gear, and speed.

What are the instance variables for the bicycle class?

When a number of objects are created from the same class blueprint, they each have their own distinct copies of instance variables. In the case of the Bicycle class, the instance variables are cadence, gear, and speed. Each Bicycle object has its own values for these variables, stored in different memory locations.

Can you assign the same object to two different classes?

Yes when you assign a object to another object of the same class, the memory address or the reference is same. But when you do child1=null;, the child2 still references the same object that it referenced during its initialization.

Why do we use class and instance specific variables?

This differentiation allows us to use class variables to initialize objects with a specific value assigned to variables, and use different variables for each object with instance variables. Making use of class- and instance-specific variables can ensure that our code adheres to the DRY principle to reduce repetition within code.